Family Anablepidae Bonaparte 1831 (Fig. 4H). Four-Eyed Fishes, Four Eyes, White-Eyes, One-Sided Livebearers; Cuatro Ojos, Ojos Blancos

Description: Body elongate; up to 32 cm in length; predorsal profile straight; head depressed at front; mouth protractile; eye horizontally divided (in Anableps), raised above top of head; fins without spines; pectoral fin low on side; pelvic fins on the abdomen, distinctly behind tip of pectoral fin; dorsal fin short, with 7–10 rays, far back on body, well behind the anal fin (Robertson & Allen 2015, Nelson et al. 2016). Distribution: Freshwater and brackish, rarely coastal marine; southern Mexico to southern South America (Nelson et al. 2016). Two genera and two species in Nicaraguan freshwaters.