BannedLagiacrus on Twitter: "Since ancient times, there have been reports about Yama Tsukami of varying sizes, shapes, colors, etc. There are various theories on this topic, and Yama Tsukami may have subspecies,
Monster Hunter Online - First Kill New Monster Yama Tsukami Party 8 Player Gameplay - YouTube
BannedLagiacrus on Twitter: "What is known is that Yama Tsukami has four limbs on its body and two spike-like whiskers on the front of its face. Although it's usually hard to see,
Alongside Giginox, Yama Tsukami and others, these resembles traditional "Monsters" the most, the rest are mostly Dragons or known animals : r/ MonsterHunter