The Rio Tefe agassizii, for instance, show two distinct color forms. One is very red but similar to other aggie color forms. The other is spangled like a Christmas ornament. Singular in appearance, but Romer says it breeds with other aggie color forms and the offspring are fertile. If wishes were fishes we'd all have ponds.
Males have a spiked tail and are quite colorful.
The fameles remain smaller and look like juveniles. What does a agassizii really look like. In other words, if you get any pair of aggies and bred them through enough generations, you should be able to isolate all the color morphs by using various selection methods. Some years ago, I remember reading in Aquarium digest that Bitaeniata, I think they were still being called Kleei at the time, will throw both red and blue individuals in their spawns. Perhaps this is also true of Bitaeniatas.