hermit crab
['honeycomb', 'acorn', 'mink', 'ruddy turnstone, Arenaria interpres', 'leatherback turtle, leatherback, leathery turtle, Dermochelys coriacea', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'brain coral']