The fossa (Cryptoprocta ferox; /ˈfɒsə/ or /ˈfuːsə/;[3] Malagasy: [ˈfusə̥]) is a slender, long-tailed, cat-like mammal that is endemic to Madagascar. It is a member of Eupleridae, the family of carnivorans, and closely related to the Malagasy civet.