As responsible aquarists, we are sometimes faced with difficult issues, and one such is certain hybrid fish. The Balloon variety of the Ram, Molly, and others comes to mind, and of course the Parrot Cichlid.
These fish are "manufactured" sometimes by selective breeding, sometimes by crossing non-compatibnle species, sometimes genetic manipulation, etc, to achieve their unusual shapes, colours, or whatever. But unseen to the aquarist is the internal damage done to the fish. This has certain consequences for the fish, such as a shorter lifespan, more suceptibility to disease along the way, and who can say what other effect on the fish's stress and thought processes.
Such deformed fish should never
be purchased, as buying them will only encourage others to create them. Stores that carry them should be told that we do not approve, and business taken elsewhere.
This article on the Parrot Cichlid should open some eyes. What have we done? The Parrot cichlid | Blog | Practical Fishkeeping