 Reaching in length, the green lanternshark has a slender body with a long, thin tail and low, conical dermal denticles on its flanks.It is dark brown or gray with ventral black coloration, which contain light-emitting photophores that may serve a cryptic and/or social function.Green lanternsharks are thought to be gregarious and may attack their prey, squid and octopus often larger than themselves, in packs.