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  • Bearded seal (Erignathus barbatus) sleeping on ice. The seal is positioned near water so it can slip in quickly if approached, such as by a polar bear.
    bearded-seal-sleeping-erignathus-bar...tif
  • Bearded seal (Erignathus barbatus) resting on ice in Svalbard. At full magnification, the seal’s curly whiskers that comprise the beard from which this animal’s common name derives are clearly visible.
    bearded-seal-resting-on-ice-svalbard...tif
  • Bearded seal (Erignathus barbatus) resting on ice in Svalbard. Bearded seals are primary prey for polar bears
    bearded-seal-erignathus-barbatus-sva...tif
  • These feathery structures are modified<br />
prostomial palps (mouth appendages) of Spirobranchus giganteus  polychaete worms. These spiral radioles are lined with cilia and are used by the worm for feeding and breathing. The circular structure in the foreground is the operculum, which the worm uses to seal its burrow.
    spirobranchus-giganteus-christmas-tr...tif
  • Female polar bear (Ursus maritimus) that had a single young cub, only a few months old. Polar bears usually have two cubs. It is possible that this female lost a cub. The stain on her nose is blood from a seal that she and her cub had been feeding upon. Photographed in northern Svalbard.
    polar-bear-female-ursus-maritimus-sv...tif
  • Small octopus at night in Lembeh Strait, with its siphon clearly visible. When an octopus wants to move rapidly, it can take water in through its mantle and then close it off to seal in the water. The octopus can then expel the trapped water through its siphon to propel itself at high speed.
    small-octopus-at-night-lembeh-strait...tif
  • A juvenile Eastern Steller Sea Lion (Eumetopias jubatus ssp. monteriensis) perched on a buoy in Chatham Strait, near Juneau, Alaska. Note the external ear visible here, which is characteristic of sea lions. Seals, by contrast, do not have outer ears.
    juvenile-eastern-steller-sea-lion-bu...tif
  • Shown here is the rediole array of a Metavermilia inflata polychaete worm. Radioles are the ciliated feather-like tentacles that sessile polychaete worms such as these use for filter-feeding and respiration. The ball is the worm’s operculum, which seals the end of the tube when the animal retracts its radioles. The worm has just defecated, poop visible coming out of the central tube.
    metavermilia-inflata-polychaete-worm...tif
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Tony Wu Underwater Photography

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