hermit crab
US /ˈhɜːr.mɪt ˌkræb/
UK /ˈhɜːr.mɪt ˌkræb/

1.
bernard-l'hermite
a crab that lives in a discarded mollusc shell to protect its soft abdomen, often changing shells as it grows
:
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The child watched a hermit crab scuttle across the sand.
L'enfant a regardé un bernard-l'hermite se déplacer sur le sable.
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Many species of hermit crabs are found in tropical waters.
De nombreuses espèces de bernard-l'hermite se trouvent dans les eaux tropicales.