I remember in school for biology an exam question was to come up with solution to gambusia infestation in nsw. It was a half-essay question, my answer was "mangrove jack". got 2 marks out of 10 for it lol
To be fair Steve id have given top marks on that one lol instant success load of jacks , the wels gota get to that size first though turtles they'd struggle in oz's waterways everything eats everything lol