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  • This is a small, unidentified amphipod, measuring about 2mm in length. Photographed at a magnification of four times life-size.
    amphipod-japan-201905-1107.tif
  • This Idiosepius paradoxus Japanese pygmy squid is consuming a crustacean, perhaps an amphipod of sub-order Hyperiidea. The compound eye of the prey is visible. These small squids immobilize prey with venom, then inject digestive enzymes and consume the liquified contents. They discard the empty exoskeletons when finished.
    idiosepius-paradoxus-eating-hyperiid...tif
  • Pictured here is a 3cm female skeleton shrimp (Caprella bispinosa) with her small white babies clinging to her body. The magenta-red spikes on her body take on this coloration during this time of year. The spines contain venom. Females carrying young are thought to use these spines to ward off potential predators targeting the young. This may include males of her own species, which may attempt to kill the young in order to mate with the female, similar to the behavior of cats. Males of this species and other skeleton shrimps, which are actually amphipods, also have venom-laden spikes, which they use for competition between males.
    caprella-bispinosa-female-carrying-y...tif
  • A southern right whale calf (Eubalaena australis), resting its head on top of its mother while looking at me. The callosities that are characteristic of this species are beginning to show on the calf’s head. Note also that the calf already carries a full complement of whale lice, what appear to be mostly or entirely Cyamus ovalis. Photographed with the permission of the Department of Environmental Affairs, South Africa.
    southern-right-whale-calf-with-mothe...tif
  • Whale lice are amphipods that scavenge for food on whales’ bodies, including consuming skin and flesh of whales. This species (Cyamus scammoni) lives exclusively on gray whales (Eschrichtius robustus). 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. There is a small whale louse visible on the right side of this large amphipod’s head, hidden between the head and the forward right appendage. Photographed in Baja California, Mexico.
    cyamus-scammoni-whale-lice-gray-whal...tif
  • This Japanese pygmy squid (Idiosepius paradoxus) has its arms wrapped around its prey, a skeleton shrimp (Caprellidae), which is a type of amphipod. Here the skeleton shrimp is clinging to the eelgrass by a single claw, but it eventually succumbed. Pygmy squids use venom to paralyze their prey, then inject digestive enzymes into their food. They ingest the liquified contents and discard the exoskeleton.
    idiosepius-paradoxus-eating-caprelli...tif
  • This is a female Japanese pygmy squid (Idiosepius paradoxus) that is consuming a large skeleton shrimp (Caprellidae), which is a type of amphipod. Pygmy squids use venom to paralyze prey, then inject digestive enzymes into their food. They ingest the liquified contents and discard the exoskeleton.
    idiosepius-paradoxus-eating-caprelli...tif
  • Cyamus ovalis, one of three whale lice species known to associate with right whales. on my hand for scale. Whale lice are amphipods. This specimen is from a southern right whale (Eubalaena australis) in South Africa. Photographed with the permission of the Department of Environmental Affairs, South Africa.
    whale-lice-cyamus-ovalis-southern-ri...tif
  • This is a large female hairy frogfish (Antennarius striatus). Her mottled appearance gave her the ability to blend-in with the visual chaos of the reef. She is also covered with small white amphipods known as skeleton shrimp (Caprellidae), clearly visible at 100% magnification.
    antennarius-striatus-striated-frogfi...tif
  • This is a large male hairy frogfish (Antennarius striatus) opening his mouth. Frogfishes exhibit this type of yawning behavior relatively frequently. In this image, the frogfish's illicium (rod) and esca (lure) are folded back and tucked away on top of the fish's head, comprising the front-most of three dorsal fins. The white hair-like protrusions on the fish's body are small amphipods known as skeleton shrimp (Caprellidae). This photograph was taken three days prior to this fish spawning with a smaller female.
    antennarius-striatus-striated-frogfi...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
  • Cyamus ovalis, one of three whale lice species known to associate with right whales. Whale lice are amphipods. This specimen is from a southern right whale (Eubalaena australis) in South Africa. Photographed with the permission of the Department of Environmental Affairs, South Africa.
    cyamus-ovalis-whale-louse-right-whal...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
  • This gray whale calf (Eschrichtius robustus) hosts a population of commensal barnacles (Cryptolepas rhachianecti) and whale lice (Cyamus scammoni) which 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, so the large individuals visible in this photograph are male. The females are smaller. 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.
    whale-lice-cyamus-scammoni-on-gray-w...tif
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