are lampreys and hagfish true vertebrates
Hagfish, which resemble lampreys, have traditionally been considered the sister taxon of the true vertebrates (lampreys and gnathostomes) but DNA evidence suggests that they are in fact the sister taxon of lampreys.n folklore lampreys are called nine-eyed eels. The name is derived from the seven external gill slits which, along with one nostril and one eye, line each side of a lamprey's head section. Likewise, the German word for lamprey is Neunauge, which means nine-eye.