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They are mostly ectoparasites, as they anchor to their prey by way of their mouth, feeding on the animal’s blood or tissues. Although lampreys and hagfish are superficially related, many of those similarities are in all probability shared primitive characteristics of historic vertebrates. Thus, fashionable classifications tend to put hagfish into a separate group (such because the Myxini or Hyperotreti), with the lampreys (Hyperoartii) being more intently related to the jawed fishes. Lampreys are c