Gambusia nicaraguensis Günther, 1866 .

Nicaraguan Mosquitofish; Olomina, Alumina, Pepesca, Pez Mosquito o Mosquitero, Olomina de Nicaragua o Nicaragüense.

Distribution: Global: Middle America; from southern Belize to central Panama, Atlantic drainages; Costa Rica: Ma (Atlantic), 0– 15 m.a.s.l., Sec, Dia.

Occurrence and conservation status: Nat, LC.

References: Bussing (1966: 229; brief description and information on distribution), Bussing (1987: 138; 1998: 209; brief description, including illustrations and an identification key, information on distribution, with a map, and ecology) and Angulo et al. (2013: 996; listed, including taxonomic information and distributional data).