Or the walking catfish.
I was down in Texas ~20 years ago on a fishing trip, when I was out prowling around some canals, I noticed quite a few non natives in one of the canals. Not just one or two species, this particular canal had at least 10 species, this is not a joke. Someone must have dumped their aquarium out into this canal. There were all varieties of Poecilia, none were nates, several types of Mbuna, and what was either Haplachromis ali, or an Alunocara variety, some Astyanax, that may or may not have been nate. The water was clear and shallow, and I sat and watched for several hours all of these fish that were out of place interact in this little artificial river scene, very surreal.