As adults, they are primarily piscivores, preying on lamprey, whitefish, grayling, young northern pike, suckers, stickleback, trout, and perch.
en.wikipedia.org In amphibians, it is little developed, and in lampreys, and hagfish, the cerebellum is barely distinguishable from the brain-stem.
en.wikipedia.org The hagfish blood is isotonic with seawater, while lampreys appears to use the same gill-based mechanisms of osmoregulation as marine teleosts.
en.wikipedia.org The exposed creatures are red, lamprey-like beings with multiple rows of razor-sharp teeth.
en.wikipedia.org Miller's thumbs and lampreys also are to be found in the waters.
en.wikipedia.org