Yeh i heard many theorys about the wild strains, the main one being that when they first started collecting Heros species, they assumed they were all the same fish (espech. Efaciatus) and dumped them all in the same containers etc...eventually they all bred together making these random strains.
They say the same about the Oscars, as Wild Oscars look very different to aquarium strains.
As for the Red Spot and Golds, the gold form is basically the Severum equivelent of the Lutistic oscar or the Pink Convict, just interbred constantly for colour...and again even more to form the Red Spot.
Some even say that the red spot has something else in its genus, and bred back to Heros multiple times to maintain the shape and personality....the main reason people believe this is Red Spots tend to be more 'round' than the Average Heros and the males tend to be infertile...
of course it could all be rubbish.
I don't personally believe Red Spots are hybrids outside of the Heros genus of any type (even if multiple generation) as South American cichlids don't breed out side of Genus groups. (unlike centrals that will breed with anything else from central america)....plus there has never ever been a proven Heros x somethign else hybrid (people say parrots are Heros x midas...but it has been proven they are infact Redhead Vieja x Midas crossed with Vieja x Midas...to make them V x M x V x M..lol...then of course bred with Convicts to make jellybeans etc.......im rambling.........)
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. I'm on MFK Monster fish keepers. And I ask the question How did we get supper reds it was very interesting. 
