Gymnogobius macrognathos
- kingdom: Animalia
- phylum: Chordata
- class: Actinopterygii
- order: Perciformes
- family: Gobiidae
- genus: Gymnogobius
- species: Gymnogobius macrognathos
Mutsu
Aomori- Yuzhno-Kuril’sk
Hokkaido- Miura
Kanagawa- Nagaoka
Niigata
Japan