chiton, coat-of-mail shell, sea cradle, polyplacophore
['mushroom', 'nail', 'sturgeon', 'tarantula', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'sulphur butterfly, sulfur butterfly', 'echidna, spiny anteater, anteater']