Gnathopogon elongatus; a species of cyprinid fish
A small freshwater fish native to Japan, often found in ponds and slow-moving streams. The name is usually written in kana.
The tamoroko is a small freshwater fish that lives in ponds and rivers in Japan.
Katakana spelling is common for this fish name; the word is usually written in kana.
Kanji form is rare and not commonly used; the fish name is normally written in kana.
The origin of the name タモロコ is uncertain. It may be a compound of 田 (ta, 'rice field') and 諸子 (moroko, a general term for small cyprinid fish), but the exact derivation is unclear.