lamprey

Any of various elongated freshwater or anadromous fishes of the family Petromyzontidae, having a jawless sucking mouth with rasping teeth and often attaching to and parasitizing other fish.

A marsipobranchiate fish, of an elongated or eel-like form when adult.

An eel-like marsipobranch of the genus Petromyzon, and allied genera; called also lamprey eel and lamper eel. The lampreys have a round, sucking mouth, without jaws, but set with numerous minute teeth, and one to three larger teeth on the palate (see Illust. of cyclostomi). There are seven small branchial openings on each side.

Any long slender primitive eel-like freshwater and saltwater fish of the Petromyzontidae family, having a sucking mouth with rasping teeth but no jaw.

primitive eellike freshwater or anadromous cyclostome having round sucking mouth with a rasping tongue