Well, fish hybridize in the wild to so it's probably not a big deal. Occasionally unusual hybrid angels and butterfly fish are caught by collectors and fetch big bucks in markets like Japan. If anything adding a bit of genetic diversity into the line of fish is probably good to keep the stock healthy.

na, genetic diversitity from different species doesn't help keep them healthy (thats like saying mixed breed dogs are more healthey than purbreads), but it can contribute to a species that is more adapatable and can outconpete either enviroment. Wild hybrids do occure but very rarely and between very closely related species who live in the same area, but they are high bucks because they are extreamly rare.

at anyrate producing hybrids for ornamental purposes is not a good practice in my eyes unless the fish are sterial so an acadental release will have no impact.

Steve