Lamprey

Lampreys (sometimes inaccurately called lamprey eels) are an ancient extant lineage of jawless fish of the order petromyzontiformes , placed in the superclass cyclostomata. the adult lamprey may be characterized by a toothed, funnel-like sucking mouth. the common name "lamprey" is probably derived from latin lampetra, which may mean "stone licker" (lambere "to lick" + petra "stone"), though the etymology is uncertain. lamprey is sometimes seen for the plural form.there are about 38 known extant species of lampreys and five known extinct species. parasitic carnivorous species are the most well-known, and feed by boring into the flesh of other fish to suck their blood; but only 18 species...

Source: Wikipedia

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