Like all tree monitors, the body is slender with a long, prehensile tail (~2 times the SVL). It was originally described by Robert Sprackland in 1991 as being similar to the green tree monitor; it was dorsally green with indistinct black chevrons, and the nape and tail were visibly dark green. However, the specimen in question has since become entirely dark grey, appearing as if it was melanistic. It lacks a visible dorsal pattern unless held under alcohol, at which point narrow dark crossbands can be faintly seen.^[2] The underside is cream-colored with deep brown spots and the throat is banded. Unique for tree monitors, the tongue color is yellow (vs. pink) and the soles of the hands and feet are light-colored (vs. dark). The total length of the known specimen is just over two feet (0.6 m), though it is likely that this represents an animal not fully grown as most tree monitors average a total length of around three feet (0.9 m).