eight Click to see full answer. Consequently, do Fossas eat humans?” Given the chance, Dollar says, a fossa will “eat anything with a heartbeat: lemurs, reptiles, chickens, fish, wild pigs.” Since humans first arrived here 1,500 years ago, 17 species of lemur have died out, as well as multitudes of other species.Similarly, is a fossa a dog or a cat? The fossa (Cryptoprocta ferox) is the largest carnivorous mammal on the island of Madagascar. They can reach nearly six feet in length, with half of that due to their long tails. They look like a cross between a cat, a dog, and a mongoose. Fossas have slender bodies, muscular limbs, and short, reddish-brown coats. Also to know is, are Fossas dangerous? Today, fossas are classified as a vulnerable species, with only about 2,500 in the wild. As one of the island’s top predators, fossas do not have natural enemies.What kind of animal is a fossa?s?/ or /ˈfuːs?/; Malagasy pronunciation: [ˈfus??]; Cryptoprocta ferox) is a cat-like, carnivorous mammal endemic to Madagascar. It is a member of the Eupleridae, a family of carnivorans closely related to the mongoose family (Herpestidae).