noun
Uperotus clava (species of shipworm)
A specific marine bivalve mollusk that bores into wood. The name is a compound of ぼろ (rag), うちわ (fan), ふなくいむし (shipworm).
ボロウチワフナクイムシは、海中の木材に穴をあける二枚貝の一種です。
The Uperotus clava is a type of bivalve that bores holes into submerged wood.
フナクイムシ is the general term for shipworms (family Teredinidae), while ボロウチワフナクイムシ refers specifically to the species Uperotus clava.
The name is a compound of ぼろ (rag), うちわ (fan), and ふなくいむし (shipworm), likely describing the appearance of the shell or the animal. The exact derivation is uncertain.