Megalomys desmarestii, also known as the Martinique muskrat, Desmarest's pilorie, or the Antillean giant rice rat, is an extinct rice rat from Martinique in the Caribbean. It was among the largest species of West Indian rice rat, as big as a cat, and was one of the first Caribbean mammals to become extinct during the 20th century. It may have been aquatic, as it was known to escape into the sea when pursued by predators, but it never swam away from the island. It was common on Martinique until the end of the nineteenth century, when attempts were made to exterminate it because it was considered to be a pest in the island's coconut plantations. It was also hunted for food; however due to a strong musky odor cooking required people to singe off its hair, air out the body overnight and boil i