noun
bivalves
Biological term for the class Bivalvia; used in zoology and related contexts.
双殻類にはアサリやハマグリが含まれる。
Bivalves include clams and hard clams.
From 双 (sō, 'pair') + 殻 (kaku, 'shell') + 類 (rui, 'class'), referring to the two-part shell characteristic of bivalves.