Family Megalopidae Jordan & Gilbert 1883 (Fig. 2G). Tarpons; Sábalos, Tarpones

Description: Body oblong but elongate, strongly compressed; head short, deep, with the profile straight above and convex below; up to 240 cm in length; mouth large, oblique, opening above, lower jaw projecting; scales very large, smooth; a single dorsal fin, with 13–21 rays, the last ray elongated; pelvic-fin rays 10 or 11; anal-fin rays usually 22–29; caudal fin strongly forked; silvery in color (Robertson & Allen 2015, Nelson et al. 2016). Distribution: Mainly marine but enters freshwaters; tropical and subtropical oceans (Nelson et al. 2016). One genus and one species in Nicaraguan freshwaters.