Hybridization in fishes is crossing two closely related but distinct subspecies of fish. As a tilapia
control measure, hybridization maybe used to produce a high percentage of male fish so that
reproduction is lower therefore overcrowding and stunting is avoided and bigger tilapia are produced.
Among the major constraints in producing hybrids are: maintaining the purity of brood
stocks, limited fecundity of parent fish which restricts fry production, difficulty in producing
sufficient number of hybrid fry due to spawning incompatibilities between the parent species