Looks like cyano, the "True" Texas cichlid. I kept several Texas cichlids back in the late 80's and all my males developed a big hump. Carpintas gets a bigger hump than cyano, but the hump in the pic, is not what I would call Carpintas "big'. carpintas also have much bigger spots which are blotchier, and the Texas are smaller and rounder like "pearls", hence the "Pearl Cichlid" name. The Carpintas is sometimes called the Green Texas, since it is very closely related and looks somewhat similar, but has a greenish background color. Juat a trade name though, anyone can make up a name, like Tamaulipas Cichlid for the Carpintas, since that is the state where they mostly are found in Mexico. As far as body shape...in many cases when the hump grows in CA cichlids, even though the hump is mostly filled with water, there is some stress on the fish, that causes a curved back look to it. And I definatly do NOT see any carpintas influence in the fish from the link you posted. But who knows, anything is possible. I once bought a cheap grade "F" Flower horn, that I swore was a Trimac.