Very elongate and cylindrical body, almost eel-like, and is covered in small scales. Mouth is large and oblique. Has a singular continuous dorsal fin, with both the dorsal and anal fins connected to the base of its lanceolate tail. Upper body/back may appear purple, blue, brown, or dark gray. Has thin chevron pattern/forward-pointing stripes along the length of the body. Sides of the body may appear silver, olive-green, or white. It is the longest goby species.