It's a rip of the classic Final Fantasy monster, Marlboro. It's located deep within the swamps in the northwestern corridor of the island (if you look at the map, it's the dark green areas). It has minions, poisons, and smells like dead, rotting fish. It also has all the qualities and attributes of a plant-like monster, except making it vulnerable to fire is too easy. In fact it secretes a special oily mucus that if set on fire, it will just set everything else on fire before it self-extinguishes.

After that, you can pretty much make up whatever 8D