It receives untreate ddomestic sewage from numerous towns and villages in addition to the agricultural and industrial wastes(Authman, 2008; Authman etal.,2008). Fishermen obtained fish fries from fish hatcheries and kept them in illegal fish farms.Fish species used in
these farmsare Oreochromis niloticus,Tilapiazillii,Oreochromisaureus and the
infrequent Clarias gariepinus. The fishermen apply either the natural food and/or
the artificial food in these farms