User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-3095304-20121109022243/@comment-77.179.241.216-20121110101341

I don't think he could fit in any characteristic of existing monsters...

And (to me) Yama Tsukami also looked kinda like an alien. Maybe he's an ED, but there's also a possibility that he's a completely new species...