Actually Chris some of Watleys discus have found themselves back into
the wild range. Jack Watley himself brought the fish down to a South
American fish farmer. This farmer raises the fish in ponds, but during
the wet season these ponds regularly overflow into the local
waterways. The fish farmer had already established the cardinal tetra
into the local waters by his practices. Now he's introducing hybrid
discus into waters with a wild population of discus. Just because you
don't expect a cross to get loose into the wild today, doesn't mean
they won't be getting loose 20 years from today.
Cary Hostrawser
Minnesota Aquarium Society
http://www.mn-aquarium.org/
Rainbowfish Study Group of North America
http://home.earthlink.net/~sbuckel/index.html