Ctenogobius boleosoma (Jordan & Gilbert, 1882) .

Darter Goby; Esmeralda Flechera, Madrejuile.

Distribution: Global: Western Atlantic Ocean; from North Carolina, USA, Bahamas, and the northern Gulf of Mexico, Mexico, to Rio de Janeiro, Brazil; entering estuaries and littoral lagoons and ascending river courses; Costa Rica: To, Pa, Ma and Si (Atlantic), 0–12 m.a.s.l., Per, Dia.

Occurrence and conservation status: Nat, LC.

References: Angulo et al. (2013: 1008; listed, including taxonomic information and distributional data) and Robertson & Van Tassell (2019: 4126; detailed description, including illustrations, information on distribution, with a map, and ecology).