I hate to be 'that guy' that points this out, but the red morph
is a wild morph, that has been observed in the same natural habitat as the greens, however they have adapted to hiding specifically under red lilly pads that helps them remain hidden.
"Two color varieties of
Petenia splendida are known: Green, also called silver, and Red. The common name for the Green/Silver variety is Bay Snook. The red variety takes the moniker Red Bay Snook. Although both color varieties were known to the hobby for some time, many many cichlid keepers had questions concerning the red variety. What evolutionary advantage could a bright red fish have in a predator rich environment?
Speaking at the 2005 American Cichlid Assocation Convention, Albert Klee recounted his trip in the 1970's to White Water Lagoon in Belize where the mystery was finally solved. In the wild, the red variety of
Petenia splendida are quite rare, but were almost always found under a variety of water lilies with bright red undersides. Thus, the red variety actually blended into the environment!" -
http://www.gcca.net/fom/Petenia_splendida.htm
Great price on the red snooks!