The chupacabra or chupacabras (Spanish pronunciation: [tʃupaˈkaβɾas], literally 'goat-sucker', from Spanish: chupa, 'sucks', and cabras, 'goats') is a legendary creature, or cyptid, in the folklore of parts of the Americas. The name comes from the animal's purported vampirism – the chupacabra is said to attack and drink the blood of livestock, including goats.

Physical descriptions of the creature vary. In Puerto Rico and in Hispanic America it is generally described as a heavy creature, reptilian and alien-like, roughly the size of a small bear, and with a row of spines reaching from the neck to the base of the tail, while in the Southwestern United States it is depicted as more dog-like.

Read more about it here:  Chupacabra - Wikipedia