The Fossa is a cat-like animal native to the island of Madagascar, the same country Majungatholus lived in. Majungatholus was the toughest carnivore on Madagascar until 65 million years ago. The island was drifting further out to sea. Plant life suffered first. Then the herbivores disappeared and then Majungatholus had nothing left to eat except for another Majungatholus. But as Majungatholus and other theropods became extinct, small carnivores, like the Fossa, came out of hiding. Today, the Fossa is the largest mammalian carnivore on the island. Its main prey are lemurs, but it also eats fish and birds. Although it is the largest mammalian carnivore on Madagascar, it's still fairly small. The Nile Crocodile is the apex predator of Madagascar.