Body eel-like. Pectoral fin small and half as long as the head. Pelvic fins are minute, mere splints. Dorsal and anal fins continuous with a caudal, which is well developed. Color can change from olive-green to brown dorsally; abdomen yellow to reddish. There is a dark bar under the eye and two above the eye across the head. There are several (about 13-15) U-shaped or V-shaped markings ("saddles") along the base of the dorsal fin reaching onto it. No lateral line canal. Scales minute, rounded, and embedded in the skin.
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