User blog comment:BannedLagiacrus/Monster Hunter Ecological and Lore Info Blog/@comment-6050823-20160726045123/@comment-27125903-20160727150943

@Blazing Black Dragon

Well Monster Hunter wasn't really a game about lore to begin with.

Also it could be possible that Plesioth, Lagiacrus and RoyalLudroth can be found in the Marshlands but it's just that we never fight them there.

Similar fashion to Lagiacrus being in the Primal Forest.