ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY
Pagurus hermit crab. Hermit crabs do not have their own shell. They have long, soft abdomens which they protecte from predators by living inside a salvaged empty seashell. They carry the shell on their back and can retract their whole body into it. Most frequently hermit crabs use the shells of sea snails and the tip of their abdomen is adapted to clasp strongly onto the shell's coiled internal structure. Filmed in the Russian Arctic, in the White Sea.
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