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  • This is a newly hatched juvenile Eumicrotremus awae lumpsucker, a species found along the Pacific coast of Japan's main island of Honshu. The fish is 2mm to 3mm in size, perched on brown algae (Lessoniaceae). The white ring pattern is characteristic of juveniles, disappearing as the juvenile takes on permanent coloration. This one has already begun to adopt an orange-red hue.
    eumicrotremus-awae-juvenile-lumpsuck...tif
  • This is a newly hatched juvenile Eumicrotremus awae lumpsucker, a species found along the Pacific coast of Japan's main island of Honshu. The fish is 2mm to 3mm in size, perched on brown algae (Lessoniaceae). The white ring pattern is characteristic of juveniles, disappearing as the juvenile takes on permanent coloration. This one has already begun to adopt a greenish hue.
    eumicrotremus-awae-juvenile-lumpsuck...tif
  • This is a juvenile spiny red gurnard (Chelidonichthys spinosus), a species of searobin that is native to the northwest Pacific. This juvenile fish was about 1.5cm in length. Photographed at a magnification of two times life-size.
    chelidonichthys-spinosus-spiny-red-g...tif
  • Juvenile smooth lumpsucker (Aptocyclus ventricosus) sitting on marine algae. This fish was about 6mm long. Visible on the right side are two small crustaceans, perhaps amphipods, for scale. Juveniles spend their first few weeks in shallow water, then descend to the deep. They return to the shallows only for reproduction. Adult females die after laying eggs. Adult males protect the eggs until the juveniles are born, and then die.
    aptocyclus-ventricosus-juvenile-smoo...tif
  • This is a juvenile Eumicrotremus uenoi lumpsucker, estimated length 3mm from head to tip of caudal fin. Adults of this species are generally a single color, losing the white rings that characterize the juveniles. This fish is sitting on Colpomenia sinuosa algae. The white crystals are grains of sand, which provide a sense of scale. This species is found in the North Pacific, on the western coast of Japan and southern coast of the Korean peninsula. Photographed at magnification of four times life-size.
    eumicrotremus-uenoi-juvenile-japan-2...tif
  • This is a one-year old juvenile smooth lumpsucker (Aptocyclus ventricosus), measuring about 5cm in length. At this age, juveniles of this species live in deep water and are normally not directly observable. This individual was raised for a year at a research facility. I photographed it upon release, as the fish made its way down to deep water.
    aptocyclus-ventricosus-one-year-juve...tif
  • This is a top-down view of a juvenile Eumicrotremus uenoi lumpsucker, estimated length three to four millimeters from head to tip of caudal fin. As these tiny fish mature, they lose the white rings that characterize the juveniles. This fish is sitting on Colpomenia sinuosa algae. The white crystals are grains of sand, which provide a sense of scale. This species is found in the North Pacific, on the western coast of Japan and southern coast of the Korean peninsula. Photographed at magnification of four times life-size.
    eumicrotremus-uenoi-juvenile-japan-2...tif
  • This is a juvenile smooth lumpsucker (Aptocyclus ventricosus) nestled among folds of wakame seaweed (Undaria pinnatifida). Juveniles of this species spend the early part of their lives in shallow water, then descend to the deep. This individual was about 6mm in size.
    aptocyclus-ventricosus-juvenile-waka...tif
  • This is a one-year old juvenile smooth lumpsucker (Aptocyclus ventricosus), measuring about 5cm in length. At this age, juveniles of this species live in deep water and are normally not directly observable. This individual was raised for a year at a research facility. I photographed it upon release, as the fish made its way down to deep water.
    aptocyclus-ventricosus-one-year-juve...tif
  • This is a juvenile Eumicrotremus uenoi lumpsucker, estimated length 3mm from head to tip of caudal fin. Adults of this species are generally a single color, losing the white rings that characterize the juveniles. This fish is sitting on Colpomenia sinuosa algae. The white crystals are grains of sand, which provide a sense of scale. This species is found in the North Pacific, on the western coast of Japan and southern coast of the Korean peninsula. Photographed at magnification of two times life-size.
    eumicrotremus-uenoi-juvenile-japan-2...tif
  • This is a one-year old juvenile smooth lumpsucker (Aptocyclus ventricosus), measuring about 5cm in length. At this age, juveniles of this species live in deep water and are normally not directly observable. This individual was raised for a year at a research facility. I photographed it upon release, as the fish made its way down to deep water.
    aptocyclus-ventricosus-one-year-juve...tif
  • Cute orange and white juvenile bicolor parrotfish with tail fin flared open
    juvenile-bicolor-parrotfish-Cetoscar...tif
  • This is a juvenile Asian sheepshead wrasse (Semicossyphus reticulatus), easily recognized by the white lateral stripe against an orange-yellow background.
    asian-sheepshead-wrasse-juvenile-sem...tif
  • Two centimeter juvenile flamboyant cuttlefish (Metasepia pfefferi) in Lembeh Strait, Indonesia
    flamboyant-cuttlefish-juvenile-metas...tif
  • Cute juvenile combtooth blenny (Aspidontus sp.) swimming in mid-water at night over deep ocean. Encountered during a blackwater night dive. Between 5cm and 6cm in length.
    juvenile-combtooth-blenny-aspidontus...tif
  • Juvenile Indian halibut (Psettodes erumei) in the Lembeh Strait, North Sulawesi, Indonesia.
    juvenile-indian-halibut-Psettodes-er...tif
  • Juvenile yellowback tubelip (Labropsis xanthonota). Photograph from Feni Islands in New Ireland, Papua New Guinea.
    juvenile-yellowback-tubelip-Labropsi...tif
  • This is a cute juvenile Valentin's sharpnose puffer (Canthigaster valentini).
    canthigaster-valentini-sharpose-puff...tif
  • On the left is a juvenile smooth lumpsucker (Aptocyclus ventricosus), about 5mm in length. To the right is a shrimp, species indeterminate. The pair came together momentarily on a blade of eelgrass (Zostera marina). Photographed at two times life-size magnification.
    aptocyclus-ventricosus-juvenile-smoo...tif
  • This is a juvenile giant Pacific octopus (Enteroctopus dofleini), about 7cm to 8cm in diameter when the octopus was in this position.
    enteroctopus-dofleini-juvenile-giant...tif
  • This is a rare photo of a juvenile darkfin sculpin (Malacocottus zonurus), about 6cm in length. This genus of fish is found in the North Pacific, generally in deep water, known to a depth of 2000m.
    malacocottus-zonurus-juvenile-darkfi...tif
  • Juvenile Asian sheepshead wrasse (Semicossyphus reticulatus) with its mouth open
    asian-sheepshead-wrasse-juvenile-sem...tif
  • Juvenile pale razorfish (Iniistius aneitensis) with its mouth open. Photographed in Lembeh Strait, North Sulawesi, Indonesia.
    iniistius-aneitensis-juvenile-pale-r...tif
  • Cute juvenile star pufferfish (Arothron stellatus), photographed in Ambon, Indonesia.
    star-pufferfish-juvenile-arothron-st...tif
  • A juvenile blotched bigeye or glasseye (Heteropriacanthus cruentatus), 3-4cm in size, photographed during a blackwater dive in Palau.
    juvenile-heteropriacanthus-cruentatu...tif
  • Late larval stage juvenile leopard blenny (Exallias brevis) encountered over deep water in Palau during a blackwater dive at night. 3cm in length.
    juvenile-hawkfish-cirrhitidae-blackw...tif
  • A juvenile squirrelfish (Sargocentron sp.) encountered during blackwater diving at night over deep water in Palau. Approximately 3cm in length.
    juvenile-squirrelfish-sargocentron-b...tif
  • A juvenile squirrelfish (Sargocentron sp.) encountered during blackwater diving at night over deep water in Palau. About 3cm long, photographed with harsh backlighting to emphasize translucent areas of fins and head.
    sargocentron-squirrelfish-juvenile-b...tif
  • A juvenile humpback whale (Megaptera novaeangliae) playing by raising and slapping its pectoral fin, with snow-capped mountains visible in the background. Photographed in Chatham Strait, Alaska
    juvenile-humpback-whale-megaptera-no...tif
  • Juvenile orange-red painted frogfish (Antennarius pictus) with open mouth. Lembeh Strait, North Sulawesi, Indonesia
    Antennarius-pictus-juvenile-open-mou...tif
  • Juvenile pajama cardinalfish hiding among coral in the calm and safe shallow-water environment of Mandarin Fish Lake in Palau
    juvenile-pajama-cardinalfish-Sphaera...tif
  • Juvenile humpback red snapper (Lutjanus gibbus). Photograph from Kokopo, Papua New Guinea.
    juvenile-humpback-red-snapper-Lutjan...tif
  • Juvenile midnight snapper against a blue background. Photograph taken in the Feni Islands, New Ireland, Papua New Guinea.
    juvenile-midnight-snapper-Macolor-ma...tif
  • Juvenile midnight snapper against a blue background. Photograph taken in the Feni Islands, New Ireland, Papua New Guinea.
    juvenile-midnight-snapper-Macolor-ma...tif
  • Juvenile midnight snapper against a blue background. Photograph taken in the Feni Islands, New Ireland, Papua New Guinea.
    juvenile-midnight-snapper-Macolor-ni...tif
  • Bright orange juvenile star pufferfish (Arothron stellatus) eating coral
    juvenile-star-pufferfish-Arothron-st..tiff
  • Bright orange juvenile star pufferfish (Arothron stellatus) defecating
    juvenile-star-pufferfish-defecating-..tiff
  • This is a 7mm-long juvenile smooth lumpsucker (Aptocyclus ventricosus) with its mouth open, sitting on Colpomenia sinuosa algae. The white crystals are grains of sand, which provide a sense of scale. This fish grows to a size of around 40cm and is known from Northern Pacific waters down to 1700m depth. It is the only known member of its genus. Photographed at four times life-size magnification.
    aptocyclus-ventricosus-juvenile-smoo...tif
  • This is a juvenile smooth lumpsucker (Aptocyclus ventricosus) with its mouth open. Body size is about seven millimeters. The fish is sitting on Colpomenia sinuosa algae. The white crystals are grains of sand, which provide a sense of scale. This fish grows to a size of around 40cm and is known from Northern Pacific waters down to 1700m depth. It is the only known member of its genus.
    aptocyclus-ventricosus-juvenile-smoo...tif
  • Juvenile hairfinned leatherjacket (Paramonacanthus japonicus) being attended to by a multicolored cleaner shrimp (Ancylomenes sp.)
    paramonacanthus-japonicus-juvenile-a...tif
  • Juvenile clown stink bug (Poecilocoris lewisi) in Kobuchizawa, Yamanashi Prefecture, Japan. 小淵沢, 山梨県
    poecilocoris-lewisi-juvenile-yamanas...tif
  • Juvenile oriental flying gurnard (Dactylopterus orientalis), measuring between two and three centimeters. Photographed during a blackwater dive at Short Dropoff in Palau.
    juvenile-flying-gurnard-dactylopteru...tif
  • Juvenile soldierfish (Myripristis sp.) encountered during blackwater diving at night over deep water in Palau. Approximately 2cm in length.
    juvenile-soldierfish-myripristis-bla...tif
  • Juvenile crescent-tail bigeye (Priacanthus hamrur) measuring approximately five centimeters. Photographed at night over deep water (greater than 1000m depth) in Palau.
    juvenile-crescent-tail-bigeye-priaca...tif
  • Juvenile spotted eagle ray (Aetobatus narinari) swimming in open water adjacent to Blue Corner dive site in Palau.
    spotted-eagle-ray-juvenile-aetobatus...tif
  • Brilliant orange-red juvenile star pufferfish (Arothron stellatus) sifting through sand, looking for food
    cute-juvenile-starry-pufferfish-arot...tif
  • Juvenile painted sweetlips (Diagramma pictum) with mouth open. Lembeh Strait, North Sulawesi, Indonesia.
    juvenile-Diagramma-pictum-painted-sw...tif
  • A cute juvenile Clark's anemonefish
    juvenile-clarks-anemonefish-amphipri...tif
  • Orange and white juvenile bicolor parrotfish (Cetoscarus bicolor)
    juvenile-parrotfish-Cetoscarus-bicol..tiff
  • Top-down view of distinctive markings of a juvenile clown stink bug (Poecilocoris lewisi) in Kobuchizawa, Yamanashi Prefecture, Japan. 小淵沢, 山梨県
    poecilocoris-lewisi-juvenile-yamanas...tif
  • Juvenile Ambon damselfish (Pomacentrus amboinensis) with open mouth. Photographed in Milne Bay, Papua New Guinea
    ambon-damselfish-juvenile-pomacentru...tif
  • Juvenile lizardfish (Synodontidae), about 2cm long, encountered during a blackwater night dive in Palau. The second dorsal fin is an adipose fin (with no rays in it).
    juvenile-lizardfish-synodontidae-pal...tif
  • Cute juvenile yellow boxfish (Ostracion cubicus) in Ambon, Indonesia
    Ostracion-cubicus-juvenile-yellow-bo...tif
  • Bright orange juvenile star pufferfish (Arothron stellatus)
    juvenile-star-pufferfish-Arothron-st..tiff
  • Juvenile Japanese angel shark (Squatina japonica), measuring about 20cm in length
    japanese-angel-shark-juvenile-squati...tif
  • Juvenile triggerfish (Balistidae) encountered over deep water during a blackwater night dive in Palau. Approximately 4cm in length.
    triggerfish-juvenile-balistidae-pala...tif
  • Bright orange juvenile star pufferfish (Arothron stellatus) eating coral
    juvenile-star-pufferfish-Arothron-st..tiff
  • Bright orange juvenile star pufferfish (Arothron stellatus) eating coral
    juvenile-star-pufferfish-Arothron-st..tiff
  • Juvenile Australian sea lion (Neophoca cinerea) at the ocean surface taking a breath in between play sessions. Photographed at Carnac Island, Western Australia
    australian-sea-lion-breathing-carnac...tif
  • Portrait of a juvenile fringed blenny (Chirolophis japonicus), about 4cm in length, photographed at a magnification of two times life-size
    chirolophis-japonicus-fringed-blenny...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
  • Rear view of juvenile Arothron stellatus starry pufferfish in the Lembeh Strait, North Sulawesi, Indonesia
    rear-view-Arothron-stellatus-pufferf...tif
  • Playful juvenile Australian sea lion (Neophoca cinerea) greeting me in shallow water at Carnac Island in Western Australia
    young-australian-sea-lion-neophoca-c...tif
  • A tiny juvenile frogfish (Antennarius sp., possible Antennarius nummifer or Antennarius coccineus) hidden among the algae, hydroids, rubble and other debris in the sand. The fish was less than one centimeter in length. Ambon, Indonesia
    tiny-Antennarius-frogfish-ambon-indo...tif
  • Beautiful pink and white juvenile Moyer's dragonet (Synchiropus moyeri) walking along a rubbly bottom
    Synchiropus-moyeri-Moyers-dragonet-A..tiff
  • This is a newly hatched endangered Japanese horseshoe crab (Tachypleus tridentatus), around 7mm in size. Juveniles emerge fully formed and functional.
    tachypleus-tridentatus-horseshoe-cra...tif
  • This is a newly hatched endangered Japanese horseshoe crab (Tachypleus tridentatus), around 7mm in size. Juveniles emerge fully formed and functional. The animal's feet are visible protruding from the rear of the carapace.
    tachypleus-tridentatus-horseshoe-cra...tif
  • This is a newly hatched endangered Japanese horseshoe crab (Tachypleus tridentatus), around 7mm in size. Juveniles emerge fully formed and functional.
    tachypleus-tridentatus-horseshoe-cra...tif
  • Pictured here is a pair of juvenile smooth lumpsuckers (Aptocyclus ventricosus), sheltered among folds at the base of wakame seaweed (Undaria pinnatifida). Pattern and color variation among juveniles is normal. Juveniles of this species spend the early part of their lives in shallow water, then descend to the deep. These fish are around 6mm in size, photographed at magnification of two times life-size.
    aptocyclus-ventricosus-lumpsucker-ju...tif
  • Strong currents around Bangka Island bring nutrients to support sea fans like this. Note the small group of juvenile convict fish at the lower left part of the sea fan. Juvenile convict fish mimic venemous striped catfish (Plotosus lineatus). These fish were mistakenly called convict blennies and convict gobies, but are neither blennies nor gobies.
    red-sea-fan-blue-water-juvenile-conv...tif
  • Juvenile manta ray swimming along the ocean surface
    juvenile-manta-ray-indian-ocean-2011...tif
  • Rear view of a juvenile manta ray swimming in blue water in along the ocean surface skimming for food, with both wings in the up position
    rear-view-juvenile-manta-ray-201104-...tif
  • Juvenile manta ray swimming along the ocean surface skimming for food
    juvenile-manta-ray-rear-view-201104-...tif
  • An inquisitive juvenile sperm whale swimming at the surface, accompanied by a little pilot fish
    juvenile-sperm-whale-physeter-macroc...tif
  • Juvenile manta ray swimming along the ocean surface skimming for food, with both wings in the down position
    manta-ray-juvenile-ocean-surface-201...tif
  • Juvenile manta ray swimming along the ocean surface
    juvenile-manta-ray-ocean-surface-201...tif
  • Rear view of a juvenile manta ray swimming in blue water along the ocean surface skimming for food, with both wings in the up position
    juvenile-manta-ray-blue-water-201104...tif
  • Colourful, cute baby longnose cowfish are always popular subjects for photography
    Juvenile-longhorn-cowfish-Lactoria-c..tiff
  • Banggai cardinalfish (Pterapogon kauderni) with hatchlings in its mouth. This is one of only two known fish species whose babies return to the parents at night. The other species is the convict fish (Pholidichthys leucotaenia). Lembeh Strait, North Sulawesi, Indonesia.
    endangered-Banggai-cardinalfish-Pter...tif
  • A baby eagle ray at the world-famous Blue Corner dive site in Palau, with barracuda, redtooth triggerfish and dive boats visible in the background. The Palauan word for eagle ray and the Audobon shearwater bird are the same. Both eagle rays and shearwaters are considered gods in Palau culture.
    juvenile-eagle-ray-Aetobatus-narinar...tif
  • A baby eagle ray at the world-famous Blue Corner dive site in Palau, with barracuda, redtooth triggerfish and dive boats visible in the background. The Palauan word for eagle ray and the Audobon shearwater bird are the same. Both eagle rays and shearwaters are considered gods in Palau culture.
    juvenile-spotted-eagle-ray-Aetobatus...tif
  • A cute baby Jorunna rubescens nudibranch
    Jorunna-rubescens-nudibranch-juvenil..tiff
  • This is a newly hatched juvenile Eumicrotremus awae lumpsucker, a species found along the Pacific coast of Japan's main island of Honshu. The fish is 2mm to 3mm in size, perched on brown algae (Lessoniaceae). The juveniles retain this distinct pattern with white rings for a brief time, eventually taking on solid coloration that varies from brown and red to green, pink and other hues.
    eumicrotremus-awae-juvenile-lumpsuck...tif
  • This is a pair of endangered Japanese horseshoe crab (Tachypleus tridentatus) juveniles. One has commenced borrowing into the substrate. The other had flipped upside-down, as the juveniles seem to do with reasonable frequency.
    tachypleus-tridentatus-horseshoe-cra...tif
  • This is a pair of endangered Japanese horseshoe crab (Tachypleus tridentatus) juveniles. Juveniles like this sometimes climb on top of and grapple with one another when they encounter each other.
    tachypleus-tridentatus-horseshoe-cra...tif
  • These are endangered Japanese horseshoe crab (Tachypleus tridentatus) juveniles clustering together.
    tachypleus-tridentatus-horseshoe-cra...tif
  • Pictured here are four newly hatched lumpsucker (Eumicrotremus awae) juveniles, around 2mm to 3mm in size, about the size of a sesame seed. These baby fish stayed together for a brief time, hidden among intricate folds of red algae (Pugetia japonica), before dispersing around the reef. Known as dango-uo in Japanese, these fish are found along the Pacific coast of the main island of Honshu.
    eumicrotremus-awae-juvenile-lumpsuck...tif
  • Two juvenile Australian sea lions playing in shallow water, with one blowing bubbles as part of the social interaction between them
    juvenile-sea-lions-playing-shallow-w...tif
  • Close-up of a flamboyant cuttlefish egg (Metasepia pfefferi), with the developing juvenile attached to its yolk sac and visible inside the egg. Super macro photograph shot at 5x life-size.
    flamboyant-cuttlefish-egg-with-juven...tif
  • Juvenile crustacean encountered during blackwater night dive in Palau. Likely the megalop stage of a decapod crab, which is the final stage of development prior to settling down to morph into benthic form. Possibly Carpilius juvenile. Carapace less than 1cm.
    decapod-crab-megalop-stage-blackwate...tif
  • Juvenile crustacean encountered during blackwater night dive in Palau. Likely the megalop stage of a decapod crab, which is the final stage of development prior to settling down to morph into benthic form. Possibly Carpilius juvenile. Carapace less than 1cm.
    crab-megalop-stage-blackwater-diving...tif
  • Juvenile Australian sea lion playing in the sand
    adorable-sea-lion-with-puppy-dog-eye...tif
  • Juvenile Australian sea lion showing off its whiskers
    sea-lion-whiskers-shallow-blue-water...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
  • 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
  • Gray whale calf (Eschrichtius robustus) looking up from the water at people on a boat, with its large mother in the foreground. Hairs are visible on the juvenile whale’s head, underscoring the fact that whales are mammals. The adult’s blowholes are clearly visible as well, once again emphasizing that these animals breathe air, just like we do.
    gray-whale-mother-calf-baja-mexico-2...tif
  • Infestation of whale lice (Cyamus scammoni) in the blowholes of a gray whale calf (Eschrichtius robustus). Whale lice are amphipods that scavenge for food on the whale's body, including the whale's skin and flesh. There is sexual dimorphism among adult Cyamus scammoni, with males being larger than females. Unlike the young of most other marine crustaceans, which have a planktonic larval stage, juvenile whale lice mature in a pouch-like structure called the marsupium, which is located on the underside of females. Photographed in Baja California, Mexico.
    whale-lice-cyamus-scammoni-infestati...tif
  • Juvenile Australian sea lion (Neophoca cinerea) silhouetted against blue skies at Carnac Island, Western Australia
    silhouette-australian-sea-lion-carna...tif
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