Brown-speckled sand-goby
- kingdom: Animalia
- phylum: Chordata
- class: Actinopterygii
- order: Perciformes
- family: Gobiidae
- genus: Istigobius
- species: Istigobius rigilius
Kapingamarangi
Pohnpei- Ifalik
Yap
Micronesia, Federated States Of
Kayangel
Kayangel
Palau
Sablayan
Mimaropa
Philippines