noun
unicorn leatherjacket
A species of filefish (Aluterus monoceros) found in tropical and subtropical waters. The name is usually written in katakana.
ウスバハギは熱帯の海に生息する。
The unicorn leatherjacket inhabits tropical seas.
市場で珍しいウスバハギを見つけた。
I found a rare unicorn leatherjacket at the market.
カワハギ (thread-sail filefish) is a more commonly eaten filefish in Japan, while ウスバハギ is less familiar and has a more elongated body.
The name likely derives from 薄葉 (thin leaf) and 剥ぎ (skinning), referring to the fish's thin, easily peeled skin, but the exact origin is uncertain.