Stingrays are a group of sea rays, which are cartilaginous fish related to sharks. They are classified in the suborder Myliobatoidei of the order Myliobatiformes and consist of eight families: Hexatrygonidae (sixgill stingray), Plesiobatidae (deepwater stingray), Urolophidae (stingarees), Urotrygonidae (round rays), Dasyatidae (whiptail stingrays), Potamotrygonidae (river stingrays), Gymnuridae (butterfly rays), and Myliobatidae (eagle rays). Stingrays are common in coastal tropical and subtropical marine waters throughout the world. Some species, such as Dasyatis thetidis, are found in warmer temperate oceans, and others, such as Plesiobatis daviesi, are found in the deep ocean. The river stingrays, and a number of whiptail stingrays (such as the Niger stingray), are restricted to fresh water. Most myliobatoids are
Los ácaros son un grupo de rayos marinos, que son peces cartilaginosos relacionados con los tiburones. Se clasifican en el suborden Myliobatoidei del orden Myliobatiformes y se componen de ocho familias: Hexatrygonidae (sixgill stingray), Plesiobatidae (deepwater stingray), Urolophidae (stingarees), Urotrygonidae (rayos redondos), Dasyatidae (whiptail stingrays), Potamotrygonidae (rayos de río), Gymnuridae (rayos de mariposa), y Myliobatidae (rayos de águila). Los ácaros son comunes en las aguas costeras tropicales y subtropicales marinas de todo el mundo. Algunas especies, como Dasyatis thetidis, se encuentran en océanos templados más cálidos, y otros, como Plesiobatis daesivi, se encuentran en el océano profundo.