User blog comment:Kogath/Monster Hunter X Discussion/@comment-26034899-20150710190738/@comment-26034899-20150710214939

Perhaps. People keep saying that the two are very similar, and that they might be related in some way.

Since people are making their own theories about the new monsters, I'm going to go on a limb and make a theory of my own: judging by the looks and abilities of Bubbles, it was probably based on Royal Ludroth. Same habitat, similar abilities (the two are practically living showers), plus Bubbles' colouration is similar to that of Purple Ludroth's.