opisthobranch
English
Pronunciation
- /ɵˈpɪsθəbræŋks/
Noun
Wikipedia opisthobranch (plural opisthobranchs)
- Any of a large and diverse group of specialized complex marine gastropods previously united under Opisthobranchia within the Heterobranchia, characterized by two pairs of tentacles and a single gill behind and to the right of the heart.