noun
Tokyo bitterling
A species of freshwater fish (Tanakia tanago) native to Japan. The name is usually written in katakana as ミヤコタナゴ.
ミヤコタナゴは絶滅危惧種に指定されている。
The Tokyo bitterling is designated as an endangered species.
The name likely combines 都 (miyako, 'capital') and 鱮 (tanago, 'bitterling'), referring to a bitterling found in the Tokyo area. The exact historical derivation is uncertain.