Gobionellus oceanicus (Pallas, 1770) .

Highfin Goby, Sharptail Goby, Slim Goby, Highfin; Esmeralda de Mar, Madrejuile Flecha.

Distribution: Global: Western Atlantic Ocean; from Virginia, USA, to Suriname; entering estuaries and littoral lagoons and ascending river courses; Costa Rica: Pa (Atlantic), 0– 10 m.a.s.l., Per, Dia.

Occurrence and conservation status: Nat, LC.

References: Robertson & Van Tassell (2019: 4176; detailed description, including illustrations, information on distribution, with a map, and ecology) and Álvarez-Calderón et al. (2018: 404; brief description, including illustrations, information on distribution, with a map, and ecology).