13.Several of these classes are specific types of fish, for example: jawless fish, like lampreys and hagfish, and cartilaginous fish, like sharks and rays.
15.In the midst of the watery mass, brightly lit by our electric beams, there snaked past those one-meter lampreys that are common to nearly every clime.
19.After analyzing more than 1,200 fossils of the Tully Monster they determined that the creature was a vertebrate, probably an ancestor of Jawless fish like lampreys.