User blog comment:Lord Loss/Monster Hunter Frontier Season Forward 5/@comment-6050823-20130206092513/@comment-969093-20130207000036

Colours aren't that strange. It's probably their native colouring. The item icons were gold anyway. And now you can see the scales unlike the volcano species where magma has covered them. :/

As for drugs, why so? They could swim and dig into solid rock in volcanic areas, why not in the Tower? And why would they not fit in their? Because they're Piscine Wyverns? They could very well originate from a nearby lake or river or anything and driven their ways up to the highlands of the Old Tower.

I think capcom did a great job on concept, colouring and location. Gives people a mindfuck to come up with explanations for that. Nothing drugs related.