Another characteristic is that the mouth is very narrow at the end, but very wide at the base on the head, and it goes far beyond the eyes, a vague illusion of a gulper eel. The genus Cyema is monotypic, its only species being this one. There is no information about its reproduction.
A distinctive characteristic of this creature is its narrow mouth at the end that widens significantly at the base of its head, extending far beyond its eyes, giving it a resemblance to a gulper eel. The genus Cyema consists only of one species, which has yet to reveal its reproductive strategies.