Bathygobius andrei (Sauvage, 1880) .

Estuarine Frillfin; Mapo de Estero, Gobio de Estero.

Distribution: Global: Eastern Pacific Ocean; from Guatemala to northern Peru; entering estuaries and littoral lagoons and ascending river courses; Costa Rica: Ba, Ta, Pi and Tr (Pacific), 0– 32 m.a.s.l., Per, Dia.

Occurrence and conservation status: Nat, LC.

References: Angulo et al. (2013: 1007; listed, including taxonomic information and distributional data) and Robertson & Allen (2015: 1991; detailed description, including illustrations, information on distribution, with a map, and ecology).