Sucker Fish
This page is the CodyCross answer for the clue below from City Life, Group 1650, Puzzle 1 (Supermarket).
Question is: Sucker Fish
and the answer is: LAMPREY
Word Meaning:
LAMPREY — Any long slender primitive eel-like freshwater and saltwater fish of the order Petromyzontiformes, having a sucking mouth with rasping teeth but no jaw.
Definitions from Wiktionary.