To become commercially viable, recirculating aquaculture systems (ras) will have to overcome several challenges. choose the correct matching between a major challenge that ras has to overcome and its possible solution. since fish raised in ras setups are typically higher trophic level species, they still consume wild caught fish, maintaining the pressure on ras operations near coastal areas where it is easy to obtain wild caught fish all choices are correct ras operations generate a lot of with a variety of alternative feeds that make the fish produce less waste most commercially important marine fish would not reproduce in development of a hormone supplement for the fish that tricks captive fish into breeding as they would in the wild