Lamprey n. : An eel-like marsipobranch of the genus Petromyzon, and allied genera. 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.

Example:
How do you prepare, cook and eat Sea Lamprey?

Taxonomy
lampreys, sea lampreys, surfeit of lampreys, fossil, species, brook lamprey, Subfamily, vertebrates, the Great Lakes, Hubbs, Kott, lakes, Petromyzontiformes, Genus Petromyzon, free encyclopedia, fish pond, populations, feed.

Defination from the web:
lamprey can range anywhere from 13 to 100 centimetres (5 to 40 inches) long. ... Lamprey leukocytes express surface Variable Lympocyte Receptors (VLRs) generated from somatic recombination of leucine-rich repeats gene segments ...