sea slug

Từ điển WordNet v3.1 - WordNet Dictionary

noun

any of various marine gastropods of the suborder Nudibranchia having a shell-less and often beautifully colored body
• Syn:
nudibranch
• Hypernyms:
gastropod, univalve
• Hyponyms:
Hermissenda crassicornis
• Member Holonyms:
Nudibranchia, order Nudibranchia