Since they are all the same species, but just different colors of the same species they are referred to as morphs in the hobby. Generally a given morph doesn't change a lot once it is in captivity, but newly harvest morphs will often change significantly under aquarium lighting. Because they are the same species, and just different color, they don't really constitute a subspecies, so everyone just refers to them as a morph.
Thanks Miz - glad you were able to gleam something new from the article.
Very cool. Does it have good color?