As far as the legality on one hand as long as it's not on a list of prohibited species it's possible one could go ahead and stock it. On the other hand I'm sure if you asked if it would be O.K. you would get a resounding "no."

Personally I would advise against it. On too many occasions have there been species that weren't supposed to be able to reproduce or were benign that turned out to be anything but. Our grand government planted the common carp and believed they would be the greatest game fish ever.

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.