User blog comment:Kogath/Monster Hunter X Discussion/@comment-25706585-20151005104307/@comment-25119729-20151006200013

We know that Stygian Zinogre are actually just regular Zinogre that changed due to the dracophage bugs they use instead of the thunderbugs, so seeing Zinogre that don't have transformed into Stygians yet wouldn't be impossible.

Also note that there is a difference between being weak to a certain element and not being able to live in a certain enviroment.