This Aqualog volume represents the first comprehensive publication in the popular literature to cover all the rays living in fresh and brakish water, with full coverage of; -The sawfishes (Pristidae) -The guitarfishes (Rhinobatidae) -The South american freshwater stingrays (Potamotrygonidae), as well as all the representatives of the electric rays (Torpediniformes), eagle rays and mantas (Myliobatidae) and whiptail stingrays (Dasyatidae) that are known to enter fresh or brakish water. An identification key for all the species is provided. The stingrays are depicted in colour photos illustrating a never-before-seen panoply of species and colour varieties.