Do not be worried about giant prawns. They are not really that big. Not more than about 15 cms max. Uncooked. If giant prawns really were giant prawns they’d hang around dark alleys frightening people, or maybe capture young people and barbeque them or cover them in mayonnaise and make them sit in avocados, or drive cars very fast. On second thoughts they probably wouldn’t drive cars as they wouldn’t be able to operate the foot controls.