Yama Tsukami

Yamatsukami is one of the oldest ancient creatures known to hunters. Despite the fact that its body shape resembles a green octopus with red eyes, it's actually an ancient dragon; those four main 'tentacles' are really clawed legs. Although a tremendous size, it is able to constantly stay up in the air with no support.

They seem to have a symbiotic relationship with Great Thunderbugs, which assist them by attacking their hunters.

Although Yamatsukami first appeared in Monster Hunter 2, it wasn't included in the PSP versions. Also Yamatsukami is the end-game boss in online Monster Hunter 2. Yama returns in Monster Hunter Portable 2nd G in the HR8-HR9 Urgent quest.