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  • Aggregation of sperm whales (Physeter macrocephalus) engaged in social activity. These whales were part of much larger gathering comprising hundreds, if not thousands, of individuals. The large aggregation persisted for two days.
    sperm-whale-aggregation-201402-1342.tif
  • Family of sperm whales (Physeter macrocephalus) engaged in social activity. Sperm whales are very tactile, as can be seen here with the whales rubbing against one another. This group had three juvenile whales among them.
    social-group-family-sperm-whales-ind...tif
  • Fluke-on view of a group of sperm whales (Physeter macrocephalus) socializing. The whales are clustered together head-first, with lots of bio-sonar clicking and rubbing together of their heads and bodies. Mass defecation is often a part of such social activity, with the defecation becoming thick enough to obscure the whales from view, as is the case here. Note the shedding of skin, which is also characteristic of sperm whale socialization.
    sperm-whales-socializing-mass-defeca...tif
  • A tiny sperm whale calf, less than two meters long, which was allowed to play by itself. The family was nearby, foraging for food. This little female swam over, played for a while, at one point placing her fluke on my head, then went back to her family. Though texts state that sperm whales are born at 4.5 meters, this one was only slightly longer than I was with my freediving fins, meaning slightly more than two meters in length. The developing mammary slits are visible in this image, as are the white streaks on her abdomen, which can be used to identify individual whales.
    sperm-whale-calf-female-201402-2664.tif
  • Spermaceti in bottles, on display at the Nantucket Whaling Museum, with a painting depicting Captain Ahab of the Pequod in Melville's Moby Dick visible in the background. This spermaceti was taken from a 46-foot male sperm whale that stranded on New Year's day 1998 in Nantucket. Spermaceti was a highly prized substance and was the primary reason for the proliferation of whaling in Nantucket.
    spermaceti-nantucket-whaling-museum-...tif
  • Inquisitive adult female sperm whale in the Indian Ocean, swimming underneath me to check me out using sonar. Sperm whales seem to swim upside-down frequently when they use sonar to investigate objects above them. Perhaps this position gives them optimal results.
    sperm-whale-swimming-upside-down-in-...tif
  • Adult female sperm whale swimming upside-down in the blue waters of the Indian Ocean. This is a position frequently adopted by sperm whales near the surface to make use of their sonar to investigate floating objects like me. I may have been the first person she had ever come across. Notice that there is a small piece missing from the dorsal edge of her right pectoral fin.
    sperm-whale-blue-water-indian-ocean_...tif
  • This is a sperm whale (Physeter macrocephalus) defecating at the oecan surface, cycling nutrients from the deep ocean to shallow waters. Research has demonstrated that transport of nutrients in this manner by megafauna like sperm whales is vital to maintining proper functioning of global ecosystems. Photographed in Sri Lanka.
    sperm-whale-poop_201104_0724.tif
  • This image of female sperm whale (Physeter macrocephalus) commencing a dive provides a clear view of her mammary slits. They are located on her abdomen, just forward of her anal slit and powerful caudal region. Photographed in Sri Lanka.
    physeter-macrocephalus-sperm-whale-m...tif
  • An adult female sperm whale (Physeter macrocephalus) turned upside-down while frolicking at the ocean surface after coming up from a long foraging dive. Photographed above a deep trench in Ogasawara, Japan.
    sperm-whale-frolicking-upside-down-j...tif
  • Close-up view of the penis of a sperm whale male fetus specimen, measuring 60cm to 70cm, that was found in the teaching collection of a natural history museum. The origin of the specimen is unknown.
    sperm-whale-fetus-penis-201606-2312.tif
  • This male sperm whale (Physeter macrocephalus) has a series of parallel scars, which are thought to be from deep tooth rakes inflicted by other males during confrontations. The scars are present on the left and right sides of the whale, as well as on the ventral surface. Note also the whitened front of the whale, which is thought by some also to result from accumulated scarring due to inter-male confrontations. Photographed in Ogasawara (Bonin Islands), Japan.
    male-sperm-whale-parallel-scars-from...tif
  • Vertebrae from a sperm whale (Physeter macrocephalus) that stranded on a small island in Vava'u, Kingdom of Tonga. These vertebrae and most of the whale's skeleton was in the process of being cleaned. The bones were buried in the sand, and there was still decomposing soft tissue on the bones.
    sperm-whale-vertebrae-on-beach-by-mo...tif
  • Sperm whale skin is thin and almost transparent, as is apparent from the large piece of skin I'm holding in my hand. Sperm whales (Physeter macrocephalus) shed and slough off skin continuously, perhaps as a mechanism for maintaining healthy skin and shedding parasites. This large piece of skin came off an adult female sperm whale, part of a family group of nine individuals.
    sperm-whale-skin-physeter-macrocepha...tif
  • Four sperm whales (Physeter macrocephalus) rubbing their heads together while socializing, forming an X-pattern. This type of tactile social interaction among sperm whales is common, and is accompanied by a lot of sound made by the whales.
    four-sperm-whales-socializing-x-patt...tif
  • An adult female sperm whale coming up to the surface to breathe between dives to forage for food. I came across this whale and several other adult females in her family unit in the Indian Ocean.
    sperm-whale-reflection-ocean-surface...tif
  • Four sperm whales hanging out just under the surface of the sea. This image won first place in the Under Water Category of the 2010 Veolia Environnement Photographer of the Year contest (organised by BBC Wildlife Magazine and the Natural History Musuem, London)
    four-sperm-whales-in-unique-formatio...tif
  • Close-up view of defecation by an adult female sperm whale (Physeter macrocephalus). Defecation at the surface is routine behavior for sperm whales. Defecation is an indication that the whale has been feeding successfully.
    sperm-whale-defecation-close-up-2016...tif
  • An adult female sperm whale carrying a large piece of giant squid, which this group of whales had brought up from the deep trench. They were playing with the leftover bits of squid, shredding their meal, perhaps in the process of weaning the juvenile sperm whale pictured swimming alongside the female. I followed this group for several days, and this female was the dominant individual, swimming by and using sonar to check out my boat and people in the water.
    sperm-whales-eating-giant-squid-phys...tif
  • A preserved sperm whale fetus (male), measuring 60cm to 70cm. Sperm whales are generally thought to be born at a length of around 450cm. Though only a fraction of estimated birth size, this fetus is fully formed. The origin of this specimen is unknown, though it likely originated from a necropsy performed during the industrial whaling period. This fetus was found among other preserved animals in the teaching collection of a natural history museum.
    sperm-whale-fetus-201606-2297.tif
  • Skeleton of female sperm whale, dubbed Jubilee, on display at the Lee Kong Chian Natural History Museum in Singapore. This 10.6m adult whale was found off Jurong Island in July 2015, with a wound in the caudal area that may have been caused by a ship propellor. During the necropsy, plastics were also found in her gastrointestinal system.
    lkcnhm-sperm-whale-201604.tif
  • Baby sperm whale (Physeter macrocephalus) playing at the ocean surface
    sperm-whale-calf-playing-dominica-20...tif
  • Inquisitive sperm whale calf (Physeter macrocephalus) approaching with mouth open and buzzing me with bio-sonar. This calf was part of a family unit that had three juvenile whales in it. The family unit was one of many that gathered for a large social event comprising hundreds, perhaps thousands of sperm whales. This image is licensed on an exclusive basis to BBC through 29 October 2021.
    sperm-whale-family-unit-juvenile-mou...tif
  • Aggregation of sperm whales (Physeter macrocephalus) engaged in social activity. There were hundreds, perhaps thousands, gathered in all directions as far as the eye could see. Most were adult females, though there were some large males present, as well as juveniles. The whales fed intermittently, but also spent substantial time at the surface and in shallow water socializing.
    large-aggregation-sperm-whales-socia...tif
  • Tiny female sperm whale calf (Physeter macrocephalus), which was allowed to play by itself. This calf's family was in the immediate vicinity socializing and foraging for food, but the calf was allowed to wander off and explore. It was inquisitive and approached several times. In this photo, the calf has placed its fluke gently on my head. We swam together like this, calf resting her fluke on my head. Of note, the calf was approximately two meters long, which is considerably smaller than the usually assumed birth size of four meters or more for sperm whale calves.
    fluke-underside-baby-sperm-whale-201...tif
  • Head-on view of an inquisitive juvenile sperm whale (Physeter macrocephalus) accompanied by large remoras and tiny pilot fish. Note the shedding of the whale's skin, which is common for sperm whales. The position of the whale's single blowhole on the left side of its head is also apparent from this angle of view.
    sperm-whale-frontal-view-physeter-ma...tif
  • Pandemonium and commotion among a group of socializing sperm whales (Physeter macrocephalus)
    sperm-whale-social-group-physeter-ma...tif
  • This was my first encounter with a sperm whale, a curious juvenile that pinged me with sonar and placed me on its head, then took one of my fins in its mouth. This whale had at some point investigated a longline, as it had a hook embedded in the crease of its jaw on the right side of its body, with fishing line trailing far back behind its fluke. I dived down to take a look at the hook, but the wound had long since healed over, making it impossible to attempt to remove the hook. This image is a film scan. This photograph received the Grand Prize at The Blue Earth Underwater Photo Contest in Japan in 2001.
    sperm-whale-with-longline-hook-in-mo...tif
  • Pictured here are ten sperm whales (Physeter macrocephalus) that were swimming together, mixed in with a larger gathering of whales. I estimate there were between 50 and 100 individuals in total, though it is difficult to be certain given their continual movement and diving. A couple of the whales can be seen defecating, an activity that seems to be a normal part of social interaction at the surface. Sperm whales are also frequently flatulent, as can be seen here.
    sperm-whales-defecating-socializing-...tif
  • Three sperm whales (Physeter macrocephalus) lined up in formation while resting between foraging dives
    sperm-whales-formation-while-resting...tif
  • Close-up view of the jaw and mouth area of a sperm whale fetus (Physeter macrocephalus) measuring between 60cm and 70cm. The fetus was male, found in the teaching collection of a natural history museum. The origin of the preserved specimen is unknown.
    sperm-whale-fetus-jaw-201606-2331.tif
  • A group of sperm whales (Physeter macrocephalus) with one defecating. These whales are all females, and were part of a large gathering, comprising up to perhaps 100 individuals divided among several groups distributed over a large area. Sperm whales seem to defecate often while they are at the surface.
    sperm-whales-defecating-sri-lanka-ph...tif
  • Inquisitive adult female sperm whale in the Indian Ocean, swimming underneath me to check me out using sonar. Sperm whales seem to swim upside-down frequently when they use sonar to investigate objects above them. Perhaps this position gives them optimal results.
    sperm-whale-swimming-upside-down-in-...tif
  • An adult female sperm whale coming up to the surface to breathe between dives to forage for food. I came across this whale and several other adult females in her family unit in the Indian Ocean.
    sperm-whale-reflection-ocean-surface...tif
  • This was part of a large gathering of sperm whales (Physeter macrocephalus) comprising hundreds, perhaps thousands of individual whales that spanned horizon to horizon for nearly three days. This was likely a meeting of multiple social units in the same clan. Pictured here is one particularly large social cluster.  This image is licensed on an exclusive basis to BBC through 29 October 2021.
    sperm-whale-large-aggregation-201402...tif
  • This is a small social unit, or perhaps part of a social unit, of sperm whales (Physeter macrocephalus). There were three young whales in the group. Pictured here is one of the young whales, around seven to eight meters in length, taking an interest in me, with the other members of the social unit visible in the background.
    sperm-whale-social-unit-inquisitive-...tif
  • Underwater view of a footprint left on the ocean surface by the fluke of a swimming adult female sperm whale (Physeter macrocephalus)
    sperm-whale-footprint-underwater-vie...tif
  • An adult female sperm whale carrying a large piece of giant squid, which this group of whales had brought up from the deep trench. They were playing with the leftover bits of squid, shredding their meal, perhaps in the process of weaning the juvenile sperm whale pictured swimming alongside the female. I followed this group for several days, and this female was the dominant individual, swimming by and using sonar to check out my boat and people in the water.
    sperm-whales-eating-giant-squid-phys...tif
  • An adult female sperm whale carrying a large piece of giant squid, which this group of whales had brought up from the deep trench. They were playing with the leftover bits of squid, shredding their meal, perhaps in the process of weaning the juvenile sperm whale pictured swimming alongside the female. I followed this group for several days, and this female was the dominant individual, swimming by and using sonar to check out my boat and people in the water.
    sperm-whales-eating-giant-squid-phys...tif
  • Swimmer stroking Scar, a male sperm whale who seeks out and enjoys contact with people. Here, he is comfortable enough to have his eyes closed during the encounter. He was around 10 years old at this time.
    scar-sperm-whale-with-snorkeler-domi...tif
  • Large cluster of sperm whales (Physeter macrocephalus) that were part of an enormous superpod gathering comprising hundreds, if not thousands, of individuals. As is typical of sperm whale social activity, there was a lot of tactile contact accompanied by biosonar clicking, with sloughing of skin, defecation, passing of gas. The water was milky white and oily from the activity.
    sperm-whale-superpod-physeter-macroc...tif
  • A friendly family of sperm whales, comprising several adult females and three juveniles. The prominent white stripes on the ventral surface of the adult in the forefront made it relatively easy to distinguish this family unit from the many dozens of others gathered in the area for socialization. Note the pectoral fin of the adult in the forefront. The bone structure, resembling the bones in a human hand, is clearly visible.
    sperm-whale-family-unit-sri-lanka-20...tif
  • Tiny female sperm whale calf (Physeter macrocephalus), which was allowed to play by itself. This calf's family was in the immediate vicinity socializing and foraging for food, but the calf was allowed to wander off and explore. It was inquisitive and approached several times. In this photo, the calf has placed its fluke gently on my head. We swam together like this, calf resting her fluke on my head. Of note, the calf was approximately two meters long, which is considerably smaller than the usually assumed birth size of four meters or more for sperm whale calves.
    fluke-underside-baby-sperm-whale-fem...tif
  • A dense group of sperm whales (Physeter macrocephalus) that were part of a massive social gathering of hundreds of individuals. As shown here, sperm whales seem to defecate frequently when they are at the surface, especially during intense social activity. The whales' defecation and other bodily excretions imparted an oily consistency to the seawater, as can be seen here, backlit by the low light of the late-afternoon sun. Besides socializing in this manner, the large gathering of sperm whales were also foraging for food in between bouts of surface activity.
    sperm-whales-defecating-socializing-...tif
  • A friendly adult sperm whale (Physeter macrocephalus) hanging just below the ocean surface, with two other members of her family group just visible in the image, one below, the faint shadow of one swimming away at the top right. Note the whitened area around the whale's mouth, which is typical of sperm whales, and also the teeth of the lower jaw. Sperm whales generally do not have teeth in their upper jaws.
    sperm-whale-female-physeter-macrocep...tif
  • Male sperm whale (Physeter macrocephalus) with lots of scars on his head and forehead, many of which appeared to be parallel scars from encounters with other male sperm whales.
    male-sperm-whale-whitened-forehead-m...tif
  • Collection of scrimshaw sperm whale teeth on display at the Nantucket Whaling Museum
    nantucket-whaling-museum-sperm-whale...tif
  • Sperm whales (Physeter macrocephalus) shed and slough off skin continuously, perhaps as a mechanism for maintaining healthy skin and shedding parasites. This is a large piece of skin that came off an adult female sperm whale, part of a family group of nine individuals. Sperm whale skin is very thin and almost transparent.
    sperm-whale-skin-physeter-macrocepha...tif
  • Adult female sperm whale (Physeter macrocephalus) at the ocean surface with her mouth open. This whale has just surfaced from foraging in deep water. There is a small piece of squid on the tip of her lower jaw. She has many visible scars left by the suckers of Architeuthis sp. giant squid, which seem to be among the primary prey hunted by sperm whales in the waters of Ogasawara (the Bonin Islands) in Japan.
    sperm-whale-mouth-open-ogasawara-jap...tif
  • An inquisitive female sperm whale that spent considerable time at and near the ocean surface spyhopping and investigating my boat and people in the water
    sperm-whale-spyhop-ogasawara-201010-...tif
  • Whereas baleen whales have two exterior nostrils (called blowholes), sperm whales (Physeter macrocephalus) have a single blowhole on the left side of their heads. The other nostril has been modified into an internal organ called the phonic lip that produces the clicks and other sounds that these whales use for communication and echolocation.
    sperm-whale-blowhole-201703-1222.tif
  • Skeleton of a 46-foot male sperm whale (Physeter macrocephalus) in the Nantucket Historical Museum. This whale stranded on New Year's day 1998.
    sperm-whale-skeleton-nantucket-whali...tif
  • Sperm whale skeleton suspended from the ceiling of Gosnell Hall in the Nantucket Whaling Museum. This 46-foot whale stranded on New Year's day 1998. Note the collection of harpoons hanging on the wall below and adjacent to the skeleton.
    sperm-whale-skeleton-nantucket-whali...tif
  • An adult female sperm whale swimming upside down near the surface. The whale's mammary glands are clearly visible adjacent to the genital slit.
    female-sperm-whale-mammary-slits-vis...tif
  • Inquisitive adult female sperm whale in the Indian Ocean, swimming underneath me to check me out using sonar. Sperm whales seem to swim upside-down frequently when they use sonar to investigate objects above them. Perhaps this position gives them optimal results. Notice that the sperm whale has closed her eyes.
    sperm-whale-swimming-upside-down-in-...tif
  • Inquisitive adult female sperm whale in the Indian Ocean, swimming underneath me to check me out using sonar. Sperm whales seem to swim upside-down frequently when they use sonar to investigate objects above them. Perhaps this position gives them optimal results.
    sperm-whale-swimming-upside-down-in-...tif
  • Group of sperm whales at the ocean surface, just before diving down
    sperm-whale-social-group-diving-2010...tif
  • Three sperm whales, the top one clearly a male, with protruding penis visible. Note also the white markings on the abdomen, which can be used to identify individual whales.
    three-sperm-whales-in-blue-water-201...tif
  • Pictured here are twelve members of a social unit of sperm whales (Physeter macrocephalus) moving slowly along at a depth of 20m for the whale in the foreground. These whales, most likely all adult females, were relaxed and resting, as evidenced by the closed eye of the whale in the foreground, and the relaxed body language of all the animals. Tactile contact among social unit members, as visible here, is common during group activity.
    sperm-whale-social-unit-resting-2017...tif
  • An adult female sperm whale carrying a large piece of giant squid, which this group of whales had brought up from the deep trench. They were playing with the leftover bits of squid, shredding their meal, perhaps in the process of weaning the juvenile sperm whale pictured swimming alongside the female. I followed this group for several days, and this female was the dominant individual, swimming by and using sonar to check out my boat and people in the water.
    sperm-whales-eating-giant-squid-phys...tif
  • An adult female sperm whale carrying a large piece of giant squid, which this group of whales had brought up from the deep trench. They were playing with the leftover bits of squid, shredding their meal, perhaps in the process of weaning the juvenile sperm whale pictured swimming alongside the female. I followed this group for several days, and this female was the dominant individual, swimming by and using sonar to check out my boat and people in the water.
    sperm-whales-eating-giant-squid-phys...tif
  • Mature sperm whale bull (Physeter macrocephalus) in the foreground with adult females visible in the background. This male was 15-16m in length. Though he approached females in the vicinity continually and persistently, the females did not exhibit interest. On this one occasion, he was associated with seven females, six of which are visible here, though the females left him shortly after this photograph was taken. Note the parallel scars on the male’s head, indiciative of encounters with other mature males.
    sperm-whale-mature-bull-with-females...tif
  • My friend Daya holding a small squid arm that I recovered from a group of sperm whales (Physeter macrocephalus) that had been foraging for food. The pieces of squid brought up by sperm whales in this area all seem to indicate relatively small prey.
    small-squid-arm-recovered-from-sperm...tif
  • A large aggregation of sperm whales (Physeter macrocephalus) engaged in social activity. Note the abundance of sloughed off skin in the water, resulting from tactile contact among the whales. Peeling skin is apparent on the individuals in the center of this image. Note also the cloud of defecation. These whales had just emerged from milling around in a gigantic cluster, with many of the whales defecating to such an extent that the water was opaque. This photograph was the winner of the Behaviour: Mammals category of the 53rd Wildlife Photographer of the Year competition in 2017 (#WPY53) organized by the Natural History Museum in London.
    superpod-aggregation-sperm-whales-de...tif
  • Male sperm whale (Physeter macrocephalus) with lots of scars on his head and forehead, many of which appeared to be parallel scars from encounters with other male sperm whales. The accumulated scars may have contributed to the whitened appeared of the whale's forehead.
    sperm-whale-male-with-white-head-and...tif
  • A view of the underside of an adult female sperm whale's fluke as it swims past. This whale and the others visible in the background were part of a superpod of sperm whales (Physeter macrocephalus) comprising up to 100 individuals.
    sperm-whale-fluke-underside-physeter...tif
  • Close-up view of the ventral surface of an adult female sperm whale (Physeter macrocephalus), with three others in the background.
    sperm-whales-physeter-macrocephalus-...tif
  • An inquisitive juvenile sperm whale swimming at the surface, accompanied by a little pilot fish
    juvenile-sperm-whale-physeter-macroc...tif
  • This is an adult female sperm whale (Physeter macrocephalus) raising her fluke just prior to diving down to forage for food.
    sperm-whale-fluke-sri-lanka-201703-2...tif
  • Portrait of a mature female sperm whale (Physeter macrocephalus)
    sperm-whale-physeter-macrocephalus-d...tif
  • Portrait of sperm whale's enlarged forehead, which contains the spermaceti that was the reason for large-scale hunting of these animals. This individual's name is Scar, an unusually friendly male sperm whale that was about ten years old at this encounter. This image received a Highly Commended recognition in the Gerald Durrell Award for Endangered Wildlife category at the 2010 Veolia Environnement Wildlife Photographer of the Year competition (organised by BBC Wildlife Magazine and the Natural History Museum London)
    scar-male-sperm-whale-dominica-20100...tif
  • Adult female sperm whale (Physeter macrocephalus) cruising at the ocean surface on a sunny day
    sperm-whale-adult-female-physeter-ma...tif
  • A family of twelve sperm whales (Physeter macrocephalus) engaged in social activity, with a lot of rubbing against one another, resulting in sloughing off of skin.
    sperm-whale-family-socializing-physe...tif
  • Part of an enormous social gathering comprising hundreds of sperm whales (Physeter macrocephalus) over many square kilometers. This group comprised dozens of individuals that were busy clicking, blowing bubbles, rubbing their bodies against one another, diving to forage for food, and defecating continuously.
    sperm-whale-social-group-physeter-ma...tif
  • Three large sperm whale teeth, illustrating preparation for scrimshaw. The tooth on the left is raw and unpolished. The middle tooth has been polished, perhaps with shark skin or some similar textured substance. The tooth on the left is in the process of being engraved with scrimshaw.
    scrimshaw-teeth-sperm-whales-nantuck...tif
  • Sperm whale tooth scrimshaw on display at the Nantucket Whaling Museum, with the inscription "The Susan on her homeward bound passage." This tooth is one of a well-known series of at least 35 engraved sperm-whale teeth known as Susan's Teeth, engraved by Frederick Myer. Frederick is the earliest known American scrimshaw artist to sign and date his work. This tooth is dated 22 August 1829. Behind this tooth is the Journal of the Whaleship Susan kept by Captain Reuben Russel from 12 December 1841 to 28 May 1846.
    sperm-whale-tooth-scrimshaw-voyage-o...tif
  • Jawbone (measuring 16 feet) and teeth of a male sperm whale (Physeter macrocephalus), on display at the Nantucket Whaling Museum. This jawbone was brought back to Nantucket by Captain William Cash of the whaling ship Islander in 1865.
    sperm-whale-jaw-nantucket-whaling-mu...tif
  • Sperm whale calf (Physeter macrocephalus) breaching. Photographed in the Ogasawara archipelago of Japan, also known as the Bonin Islands in English.
    breaching-sperm-whale-calf-physeter-...tif
  • Head-on, close-up view of an adult female sperm whale (Physeter macrocephalus). This angle provides an excellent view of the sperm whale's disproportionately large forehead. The white coloration around the whale's mouth is a common trait.
    sperm-whale-head-physeter-macrocepha...tif
  • Four sperm whales (Physeter macrocephalus) hanging head down in the water, engaged in social interaction. Sperm whales are tactile, often making body contact with other whales, as shown here. They also produce a lot of sound during social interaction like this. Photo taken in Roseau, Dominica.
    four-sperm-whales-socializing-hangin...tif
  • Photographer Douglas Seifert demonstrating the stickiness of the suction rings of an Architeuthis giant squid feeding arm. The squid's suction rings are lined with sharp, serrated teeth made of chitin, which help the animals to grasp and cling to prey. In this photograph, the suction rings are clinging to the glass of Douglas's scuba diving mask. I retrieved this 351-centimeter long Architeuthis arm fragment after seeing a sperm whale breach. Photographed in Ogasawara, Japan.
    douglas-seifert-architeuthis-giant-s...tif
  • This sperm whale has just come up to breathe, after foraging for prey in deep water. There is a small piece of squid visible, attached to the whale's top left jaw. It is very likely a piece of Architeuthis giant squid, which seem to be relatively common in the deep waters adjacent to the Ogasawara island chain of Japan. There are also scars made by suction cups of squid feeding tentacles visible on the forehead of the whale. Those suction cups are lined with finely serrated rings of teeth made of chitin.
    sperm-whale-physeter-macrocephalus-a...tif
  • This is a close-up view of the forehead of a friendly juvenile male sperm whale named Scar. This whale actively sought out contact with boats and people, perhaps due to help and compassion he received from local residents in Dominica when he was injured as a calf. When the mood struck him, Scar would approach at high speed in the water and run right into you because he wanted to be petted. He seemed to relish human touch, closing his eyes and rolling around, much like a playful puppy would.  Scar was about ten years old when I took this photograph, which meant he was almost mature and was due to head north to higher latitudes to feed and mature into a bull. At 50% or greater magnification, you can see small pieces of squid stuck in his mouth, about half-way down the jawline. Andrew Armour, who introduced me to Scar, often picked the scraps out of Scar's mouth. By all accounts, Scar is an extraordinary whale.
    scar-the-friendly-sperm-whale-forehe...tif
  • Inquisitive adult female sperm whale in the Indian Ocean, swimming underneath me to check me out using sonar. Sperm whales seem to swim upside-down frequently when they use sonar to investigate objects above them. Perhaps this position gives them optimal results.
    sperm-whale-swimming-upside-down-in-...tif
  • Inquisitive adult female sperm whale in the Indian Ocean, swimming underneath me to check me out using sonar. Sperm whales seem to swim upside-down frequently when they use sonar to investigate objects above them. Perhaps this position gives them optimal results.
    sperm-whale-swimming-upside-down-in-...tif
  • Female sperm whale diving. This particular individual had many white patches (unique pattern of birthmarks) on her abdomen and a bit on her dorsal surface, making her easy to identify. She was quite shy, and dived quickly. Note the stream of bubbles trailing from her dorsal fin as she dives.
    sperm-whale-diving-trailing-bubbles_...tif
  • A female sperm whale with a calf. Sperm whales engage in communal care for their young, including communal nursing, so it is not possible to determine whether or not this adult female is the calf's mother by observing them.
    sperm-whale-mother-and-baby-201001-2...tif
  • A mature bull sperm whale, which was significantly larger in size than the females and juveniles, perhaps approaching 20 meters in length. As soon as the large male announced its arrival in the area with a series of loud clangs, the other whales swam toward it to socialize. Mature males spend more time in higher latitudes in the northern hemisphere and lower latitudes in the southern, so in-water encounters with them are relatively infrequent.
    large-mature-bull-sperm-whale-with-j...tif
  • Large social group of sperm whales playing at the surface. These sperm whale were making a lot of sound, primarily repetitive clicking of their signature coda
    sperm-whale-social-group-playing-in-...tif
  • Modern scrimshaw, sperm whale teeth, Kingdom of Tonga.
    modern-scrimshaw-sperm-whale-teeth-t...tif
  • Jagging wheels, or pie crimpers, made of sperm whale teeth were ostensibly for cutting and decorating pastries, but they may have been valued primarily for their design and aesthetic appeal. This particular jagging wheel is one of many on display at the Nantucket Whaling Museum.
    sperm-whale-tooth-scrimshaw-jagging-...tif
  • Adult female sperm whale playing at the surface. After taking a few breaths, the whale dropped below the ocean surface, rolled around a bit, and used its sonar to check me out.
    adult-female-sperm-whale-playing_201...tif
  • This is a sperm whale (Physeter macrocephalus) defecating while hanging in a vertical position.
    sperm-whale-defecating-vertical-2014...tif
  • A family of sperm whales (Physeter macrocephalus) resting at the ocean surface, with the lead female holding Architeuthis giant squid in her mouth. There was a calf in this family group that was unable to dive deep for extended periods of time with the adults. It is possible that the adults were teaching the calf to consume giant squid, as the family group played with the squid for an extended period of time, with the whales shredding the squid to pieces in the process. Photographed in Ogasawara, Japan.
    sperm-whales-eating-giant-squid-phys...tif
  • Ventral view of an adult female sperm whale (Physeter macrocephalus) at the ocean surface with her mouth slightly open. From this angle, the pockets in her upper jaw are clearly visible. Sperm whales have teeth only in their lower jaws. The pockets are where her teeth fit in.
    sperm-whale-adult-female-ventral-vie...tif
  • Close-up view of the umbilicus, or navel, of male sperm whale fetus (Physeter macrocephalus). This preserved specimen measured between 60cm and 70cm. It was found in the teaching collection of a natural history museum. Its origin is unknown.
    sperm-whale-fetus-umbilicus-201606-2...tif
  • Plastic garbage found in the gastrointestinal system of 10.6m female sperm whale (Physeter macrocephalus) found off Jurong Island, Singapore in July 2015. This whale also had injuries in the caudal area that may have been caused by a ship propellor. This plastic and the skeleton of the sperm whale is on display at the Lee Kong Chian Natural History Museum in Singapore.
    plastic-trash-sperm-whale-singapore-...tif
  • A group of socializing sperm whales (Physeter macrocephalus). The whale in the foreground is male, with his penis extended. Though difficult to assess from this perspective, the male is substantially larger than the accompanying females.
    sperm-whales-socializing-male-with-p...tif
  • A very small female sperm whale calf (Physeter macrocephalus). This calf's family was in the immediate vicinity socializing and foraging for food, but the calf was allowed to wander off and explore by itself. It was inquisitive and approached several times, placing its fluke gently on my head at one point. Of note, the calf was approximately two meters long, which is considerably smaller than the usually assumed birth size of four meters or more for sperm whale calves.
    sperm-whale-calf-female-very-small-2...tif
  • Male sperm whale (Physeter macrocephalus) with lots of scars on his head and forehead, many of which appeared to be parallel scars from encounters with other male sperm whales. The accumulated scars may have contributed to the whitened appeared of the whale's forehead.
    sperm-whale-male-with-whitened-foreh...tif
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Tony Wu Underwater Photography

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