I agree that the invasive species can be just as troublesome as the genetic engineered "mutants".
There is always a risk for escaped or abandoned pets become a local species if they adapt and survive in the new environment.
I thought the snakehead is a problem in many states now in the U.S. There was even a cheap scifi movie about mutated large snakeheads start to eat everything including people. Some large python from southeast Asia were caught on photo to swallow American alligator whole in the swamp.
Well that is off the topic.
Whatever pets you own, make sure they stay in captivity. I think there should be better law against the release of non native species into the wild, genetic engineered or not.