オニハタタテダイ

noun

masked bannerfish; pennant coralfish

A species of butterflyfish (Heniochus monoceros) found in the Indo-Pacific. The Japanese name is a specific biological common name.

• ダイビング中ちゅうにオニハタタテダイの群むれを見みた。

  I saw a school of masked bannerfish while diving.