Emerald Goby
- kingdom: Animalia
- phylum: Chordata
- class: Actinopterygii
- order: Perciformes
- family: Gobiidae
- genus: Ctenogobius
- species: Ctenogobius smaragdus
Vila Velha
Espírito Santo
Brazil
Limestone Creek- Marco
- Tequesta
Florida
United States