Vampyrocrossota
Vampyrocrossota
Genus of hydrozoans
Vampyrocrossota is a genus of hydrozoans of the family Rhopalonematidae.[1] The genus only contains one species, Vampyrocrossota childressi.[2] Unlike many hydromedusae, these animals do not have a sessile stage. Rather, they spend their entire lives in the water column as plankton. It is the only known species with a medusa that is truly black.[1]