noun
rosy bitterling
A small freshwater fish, Rhodeus ocellatus, known for its rosy coloration. The name is usually written in katakana.
バラタナゴは日本の川や池に生息する小さな淡水魚です。
The rosy bitterling is a small freshwater fish that inhabits rivers and ponds in Japan.
From 薔薇 (bara, 'rose') + タナゴ (tanago, 'bitterling'), referring to the rosy color of the fish.