Gobiesox potamius Briggs, 1955 .

Pacific Riverine Clingfish, Smooth Clingfish; Chupapiedras, Chupapiedra Liso, Chupapiedra de Río del Pacífico, Guarasapo.

Distribution: Global: Eastern Pacific Ocean; from El Salvador to eastern Panama; entering estuaries and littoral lagoons and ascending river courses; Costa Rica: Ni, Te, Be, Ba, Ta, Pi and Tr (Pacific), 0– 140 m.a.s.l., Per, Dia.

Occurrence and conservation status: Nat, LC.

References: Bussing (1966: 237; listed, information on distribution), Bussing (1998: 249; brief description, including illustrations and an identification key, information on distribution, with a map, and ecology) and Angulo et al. (2013: 994; listed, including taxonomic information and distributional data).