. . "Lampreys (sometimes also called lamprey eels) are any jawless fish of the order Petromyzontiformes. 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.Currently there are about 38 known extant species of lampreys."@en .