Synbranchus marmoratus Bloch, 1795 .

Marbled Swamp Eel; Anguila, Anguila de Pantano, Anguila de Suampo, Anguila de Lodo, Anévila, Anguila Falsa, Culebra, Anguila de Pantano Moteada.

Distribution: Global: North, Central and South America; from southern Mexico to northern Argentina, Atlantic and Pacific drainages; Costa Rica: LN, RF, SJ, SC, Sa, To, Pa, Ma, Si (Atlantic), Ni, Te, Be, Ba, Ta, Pi, Tr and Co (Pacific), 0– 640 m.a.s.l., Sec, Pot.

Occurrence and conservation status: Nat, LC.

References: Bussing (1966: 237; listed, information on distribution), Bussing (1987: 167; 1998: 260; brief description, including illustrations and an identification key, information on distribution, with a map, and ecology) and Angulo et al. (2013: 998; listed, including taxonomic information and distributional data).