Do everyone a favor and NEVER RELEASE NONNATIVE SPECIES INTO THE WILD!
One more note on this, even if it is a native and you want to release it, make sure that you release it into the same resevoir into which you got it. If you don't know where it came from, you should euthanize it before releasing it into the wild. Different bodies of water contain a different assortment of fishes, and you could upset natures balance by releaseing a native species where it does not belong, just as you can by releasing a nonnative species.
One more note on this, even if it is a native and you want to release it, make sure that you release it into the same resevoir into which you got it. If you don't know where it came from, you should euthanize it before releasing it into the wild. Different bodies of water contain a different assortment of fishes, and you could upset natures balance by releaseing a native species where it does not belong, just as you can by releasing a nonnative species.