Eucinostomus gracilis (Gill 1862) . Graceful Mojarra, Slender Mojarra; Mojarra Plateada, Sargo, Comearena, Palmito

Vouchers: FMNH 5838 (1). Distribution: Eastern Pacific Ocean; from Anaheim Bay, southern California, USA, to Peru, including the Galapagos islands;entering estuaries and littoral lagoons and ascending river courses; (Nicaragua) PN and Ni (Pacific); 0–8 masl; Per, Dia, Amp. Occurrence and conservation status: Nat; LC (2010), population trend unknown. Literature: Villa (1982: 178; detailed description, including illustrations and an identification key, and information on distribution and ecology), Robertson & Allen (2015: 1334; detailed description, including illustrations, and information on distribution, with a map, and ecology) and Angulo (2021: 64; listed, including information on distribution).