When you first see a Fossa, you might think it’s a member of the cat family. However, it’s actually related to the mongoose! They’re about 23-30 inches long, with an extra 22-28 inches added for their tails, and they can weigh somewhere between 15 and 26 pounds. They have short brown fur, and retractable claws. They are native to Madagascar and are actually the largest carnivore on the island.