There are at least 47 different ones, I have nile, but there are red, blue and mixes. Most live by the same rules (temps and spawning) as the Mozambique. The big ones you speak of could well be Mozambique, just older. My largest are 7 pounds an their parents are two years old.

1/4 & 3/4 acre ponds. A thousand miles from no where and there is no place I want to be...
Dwight Yoakam