big fish

There's a very big reason not to release your pet fish into a nearby waterway.  The fish may look lonely in it's little bowl but it really doesn't need the friends down at the lake.  Most fish grow to their environments which means that if that small koi or goldfish is now in a lake, they're going to adapt.  They can introduce parasites that can harm other wildlife and they can eat their way through the ecosystem.  goldie