A great tropical pond fish. If you've ever seen the top down outline of one of these beauties in a pond you can understand their popularity and persistence in the hobby in-spite of their obscene size. They have great personalities to boot and train readily.
I know a place that has a 7ft one in a tank. These are not aquarium fish, these are pond fish. Should not be kept by anyone who doesn't have a privately owned pond which has no access to other water. If you have a dechlorinated swimming pool, this would work great.