Eucinostomus gracilis (Gill, 1862) .

Graceful Mojarra, Slender Mojarra; Mojarra Plateada, Sargo, Comearena, Palmito.

Distribution: Global: Eastern Pacific Ocean; from Anaheim Bay, southern California, USA, to Peru, including the Galapagos Islands; entering estuaries and littoral lagoons and ascending river courses; Costa Rica: Tr (Pacific), 0– 5 m.a.s.l., Per, Dia.

Occurrence and conservation status: Nat, LC.

References: Bussing (1966: 237, as Eucinostomus californiensis —synonym; listed, information on distribution) and Robertson & Allen (2015: 1334; detailed description, including illustrations, information on distribution, with a map, and ecology).