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" ( "to lick" + "stone"), though the etymology is uncertain.

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" ( "to lick" + "stone"), though the etymology is uncertain.