Well in florida they could release them in the everglades and they would breed like crazy and eat all the alligators. Well i dont know it that would happen but it sounds cool.
its cos there dnt want people getting atakc by aligators and piranhas lol!!! here britain they wouldn't survive a second pratically in are muddy waters lol!! i wish livebeaeres could then i owuld get pond and put them i it!