noun
European bitterling
A small freshwater fish, Rhodeus amarus, native to Europe. The name is a direct borrowing from English 'European' plus the Japanese word タナゴ (bitterling).
ヨーロッパタナゴは観賞魚として飼育されることもある。
The European bitterling is sometimes kept as an ornamental fish.
Compound of ヨーロッパ (Yōroppa, 'Europe') + タナゴ (tanago, 'bitterling'). The first part is a loanword from English 'Europe', and the second is a native Japanese word for a type of small freshwater fish.