This snake is very slender, roughly 2 cm (0.79 in) thick, and may attain a total length of about 1.5-2 m (59-79 in). The tail is long and very delicate, but mostly used to hold on while reaching for prey. The head is aerodynamically shaped and very pointy, the mouth is very large and extends almost the whole length of the head. The tongue is long and green; when in use it is kept outside the mouth and moved up and down. It is bright green dorsally, and yellowish green ventrally and on the upper lip. There is a narrow yellowish-white stripe along each side of the belly and tail. Snout very prominent, about three times as long as the diameter of the eye. No loreal, prefrontal contacting 2 or 3 upper labials. 9-10 upper labials, 4th, 5th, and 6th (or 5th, 6th, and 7th) entering the eye. Temporals very large, 1 + 2.  Dorsal scales weakly keeled, arranged in 17 rows at midbody. Ventrals 198-217; anal plate divided; subcaudals 139-165, also divided.