Fire Spawn

In Metroid Prime Hunters, the Fire Spawn is a large, silica-based predator native to the planet Alinos. It lives in lava pools, which it cannot leave, and spits plasma to repel intruders and capture prey. It is invulnerabe to heat-based weaponry, and cannot withstand cold temperatures. Samus encounters only one during her visit to Alinos, in the basement level of an Alimbic structure. Here she discovers that Fire Spawn are most vulnerable in the mouth area.

It seems that Fire Spawn are genetically similar to the cold-acclimated Arctic Spawn.