User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-95.93.30.63-20121117124740/@comment-4212769-20121118094355

For me the cave in Area 8 looks like a "perfect" nest for monsters and I believe that most aquatic monsters see that the same way:


 * Great access to the water, more than one way out and a shortcut and such (Area 3 to Area 8)


 * Only one direction from where predators would come from so perfectly to protect the offspring and the nest.


 * Only an aquatic way (when not dry season like in MHP3rd) means monsters like Deviljho, Rathian and Nargacuga (or their ancestors respectively) cannot get in, much less predators and with that danger.

I don't think monsters would leave such a great nest unused if they found it.