Flame Angel - Tahiti (reddest); Marshall Islands (next reddest)

[Salty150]

I guess the NLS Red also turns yellow fish orange...

So...

 

[OrionN]

I think coloration have to do with health and diversity of diet. We see color changes in fish that does not have diversity of food they have in the wild. Genetically, some flame angels start out with redder coloration. How much of these they can keep depends on how well we care for them.