chiton, coat-of-mail shell, sea cradle, polyplacophore
['eel', 'chain mail, ring mail, mail, chain armor, chain armour, ring armor, ring armour', 'sturgeon', 'jellyfish', 'pick, plectrum, plectron', 'axolotl, mud puppy, Ambystoma mexicanum', 'Gila monster, Heloderma suspectum']