It was among the largest species of West Indian rice rats, as big as a cat, and was one of the first Caribbean mammals to become extinct during the 20th century.[2] It may have been semi-aquatic, as it was known to escape into the sea when pursued by predators, but it never swam away from the island.[4] It was common on Martinique until the end of the 19th century, when attempts were made to exterminate it because it was considered to be a pest of the island's coconut plantations.It was also hunted for food; however, due to its strong musky odor, this was uncommon.On 8 May 1902, the volcano Mount Pelée erupted, completely destroying the island's principal city of Saint-Pierre.