If they can genetically engineer a fish then they can make them easily identifiable so that they can't be passed off as other fish which is already a huge probl

If they can genetically engineer a fish then they can make them easily identifiable so that they can't be passed off as other fish which is already a huge problem. Black light markers on the skin or flesh perhaps. Having some really bad genetic trait that makes them easy prey or die quickly if they escape into the wild is another idea instead of 'top men' just saying 'trust us.'