noun
raccoon butterflyfish; moon butterflyfish
A species of butterflyfish (Chaetodon lunula) with a distinctive masked face pattern. The name is usually written in katakana.
水族館でチョウハンを見た。
I saw a raccoon butterflyfish at the aquarium.
チョウハンはインド洋や太平洋に生息している。
The raccoon butterflyfish inhabits the Indian and Pacific Oceans.
The name チョウハン (蝶斑) literally means 'butterfly spot', referring to the butterfly-like pattern and the spot near the tail. The exact origin is uncertain, but it is a descriptive compound common in Japanese fish names.