noun
bitterling
Refers to small freshwater fish of the subfamily Acheilognathinae, especially the species Acheilognathus melanogaster. Common in ponds and slow streams in Japan.
近所の池でタナゴを見つけた。
I found a bitterling in the neighborhood pond.
タナゴは二枚貝に卵を産むことで知られている。
Bitterlings are known for laying their eggs in freshwater mussels.
The origin of the word タナゴ is uncertain. It is a native Japanese name for this fish, with no clear kanji etymology.