Genus: Ethadophis, Ordinary Snake-Eels
front nostril tubular, rear inside mouth
Very elongate (body depth 1.5-2% of TL); head compressed; body cylindrical at front, compressed at rear; tail 38-49% of TL; snout rounded, overhanging, without a median longitudinal groove on underside; front nostril in a short tube near tip of snout, rear nostril inside mouth just before eye, in a short tube with a front flap; eye small, over central 1/3 of mouth; teeth small, conical, pointed, in single series on jaws and roof of mouth, central front teeth exposed under overhanging snout, but not conspicuous; gill openings crescent shaped, vertical, low on sides, widely separated under throat; gill pouch expanded; dorsal and anal fins forming ridges below the skin; dorsal fin origin on head, well before gill opening; no pectorals; tip of tail finless, blunt and fleshy; skin smooth, with papillae on front of head and tip of tail; lateral line complete, lines of each side of head connected by 2 canals with across top of head.
A genus with 5 known species that occurs on both sides of the Atlantic as well as the eastern Pacific. One west Atlantic species in the Greater Caribbean.