Studies of genetic variation within and among species of penaeid shrimp in nature are of interest to culturists. They provide information about genetic differences among potential founder populations for initiation of aquaculture stocks. In aquaculture, the application of genetic techniques provides opportunities to maximize the benefits of selective breeding, develop new strains of species, including hybrids, maintain genetic vigor in farmed stocks and provide an early warning system for possible undesired inbreeding, explore the potential of genetically enhanced traits such as improved growth rates and disease resistance.