lamprey

n. eel-like fish having a rounded mouth and horny teeth

A lamprey (sometimes also called lamprey eel) is a jawless fish with a toothed, funnel-like sucking mouth. While lampreys are well known for those species which bore into the flesh of other fish to suck their blood, these species make up the minority. In zoology, lampreys are often not considered to be true fish because of their vastly different morphology and physiology.
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Noun
1. primitive eellike freshwater or anadromous cyclostome having round sucking mouth with a rasping tongue
(synonym) lamprey eel, lamper eel
(hypernym) jawless vertebrate, jawless fish, agnathan
(hyponym) sea lamprey, Petromyzon marinus
(member-holonym) Petromyzontidae, family Petromyzontidae

(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.
  

n.
تنبو مچھلي, (مورينہ)