Enzootic is a biotech company that specializes in aquaculture. It has developed a technique that changes the sex of a female prawn to a male prawn. Since males are larger than females, this is expected to increase output by 60%. Enzootic has yet to fully explain how this works and whether it might adversely affect those who eat these prawns. Reuters 2015 Oct 19 (Story) http://www.reuters.com/article/2015/10/19/us-israel-prawn-gender-idUSKCN0SD12E20151019