noun
crucian carp
A common freshwater fish in Japan, often used in traditional dishes like 鮒寿司 (funazushi). The scientific genus is Carassius.
池でフナを釣った。
I caught a crucian carp in the pond.
Alternate kanji form; very rare.
コイ (carp) is a larger, often ornamental fish, while フナ is a smaller wild species.
The origin is uncertain; the word is native Japanese. The kanji 鮒 and 鯽 are Chinese characters for the same fish.