Elongated cylindrical eel-like body. Body is robust while the tail is tapered and compressed. May appear olive-green/greenish-yellow, brown/tan, or dark-gray and fade to white near the belly. Sometimes, no fading occurs and a distinct break between the colors on the back and belly may be observed. It has a forward-oriented mouth with an underbite. Dorsal and anal fins are continuous with its tail fin. Well-developed pectoral fins and no pelvic fins.