noun
Acheilognathus macropterus (species of cyprinid)
A species of bitterling-like fish; the name is a taxonomic term and may be encountered in field guides or ichthyology contexts.
オオタナゴは中国やベトナムに分布する淡水魚です。
Acheilognathus macropterus is a freshwater fish distributed in China and Vietnam.
タナゴ refers to bitterlings in general, while オオタナゴ is a specific species with larger fins.
The name literally means 'large bitterling' (大 + タナゴ). The kanji 鱮 is an obscure character for a type of carp-like fish.