User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-1758220-20110914182322/@comment-1011548-20110914202128

Hm. Well. Fatalis are kind of hard to talk about, because even in-game people don't know crap about them. Black Fatalis is only fought in the Castle Sharade, and White Fatalis is only fought in the Tower - goodness knows what their natural habitats are (Crimson probably really is a Volcano-dwelling beastie). To be honest there isn't really enough evidence to conclude whether they are different stages of a life cycle or whether they're completely different species (IIRC some of Crimson's materials say that they're "deep red over a layer of black) which would imply that Crimson is an older form of Black). The ability of White to control lightning (well, electrically charge the air around it) would suggest it's a seperate subspecies, I can't really see that as being a skill you could learn.

Good question though. Any ideas yourself?