very large ray, also called devilfish,
1760, from Sp. manta
"blanket" (1748 in this sense, specifically in ref. to a type of wrap or cloak worn by Spaniards), from L. mantellum
"cloak" (see mantle
). The ray so called "for being broad and long like a quilt" [Jorge Juan and Antonio de Ulloa, "A Voyage to South America"].