User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4911512-20140526215843/@comment-5043481-20140527101958

I think the running through lava thing is more of a gameplay thing than saying that the monster could survive in lava. Otherwise you could just trap a monster next to a lava lake and have it burn to a crisp.

I think that some monsters could walk through lava for short periods, like uragaan, gravios, basarios and akantor. Just due to size and armour plating. The worst offenders are great wroggi, rajang and felyne comrades in unite. Rajang completly submerges to get to the point where he jumps to the next area. And he has no armour at all.