Longfin silverside
- kingdom: Animalia
- phylum: Chordata
- class: Actinopterygii
- order: Atheriniformes
- family: Atherinopsidae
- genus: Atherinella
- species: Atherinella eriarcha
Cabo San Lucas
Baja California Sur- Acapulco
- Los Almendros
Guerrero- Puerto Escondido
Oaxaca
Mexico