Environments with high risk of injuries by stingrays. (A) A fisherman handling marine stingrays in a fish market. (B) An amateur fisherman was fishing in a tributary of the Araguaia River (Midwest region of Brazil) when he was injured by a freshwater stingray. (C) A fisherman pushes his boat into shallow waters of a tributary of the Amazon River where rays are common: the risk of envenomation is high. (D) The pain of the man in (B) was excruciating. Photos by: Vidal Haddad Junior and Luís Fernando Beretta Gonçalves.