The Sea Lamprey is a primitive, jawless fish that is often confused as an eel. Because of its parasitic lifestyle, it has had severe negative impacts on Great Lakes fish populations such as Lake Trout, Rainbow Trout, Whitefish, and Walleye. It uses its suction cup-like mouth and raspy teeth to latch on to its victims and feed on their blood and body fluids, killing or severely injuring native fish.
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