User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-21371438-20130920092409/@comment-4212769-20130920145116

Again... the catastrophy system was introduced in the third/3rd generations from MHTri to MH3U. So it doesn't apply to 1st gen (Lao-Shan Lung, Kirin, Fatalis and Crimson Fatalis) and 2nd gen (Teostra, Lunastra, Kushala Daora, Chameleos, etc.). Further is Jhen Mohran the bringer of wealth as the ore from its back is very valuable. But it's also bringer of disaster in form of sand storms and its physical presence, destroying ships and such thing.

Only because they aren't seen out of these areas, it doesn't mean they wouldn't go out. And Kushala Daora, Chameleos, Lunastra and Teostra are seen in normal areas so that they eat is pretty probable. Dire Miralis could simply go into the sea to get its food unseen on the ocean ground. And like other Elder Dragons are only seen in unknown areas they could also go to evenly unknown areas to feed. And of course most have every characteristic of hunters (claws, fangs, stong limbs, etc.), so why should they have evolved such tools when they don't need them?

And like I said... no demi-god like monsters in MH...