Hermit Crab (Pagurus samuelis) - These crabs can be found in the shells of other animals, crawling around the tidepools.
Although hermit crabs often "fight" with each other, they are rarely hurt during this activity. Hermits are thought to be unable to digest large food items and are poor competitors against snails; they are therefore unlikely to kill a mollusc (such as a snail) for its shell. Hermit crabs must change shells to accommodate their growing bodies. If there is a lack of suitable shells, hermit crab populations could be affected.
U.S. National Park Service
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