Xingu River ray mostly brownish-dusky (large white center to underparts of "P. henlei"). Compared to "P. albimaculata", "P. leopoldi" has fewer and larger yellowish-white spots above. Xingu River ray The Xingu River ray, white-blotched river stingray, or polka-dot stingray ("Potamotrygon leopoldi") is a species of freshwater fish in the family Potamotrygonidae. It is endemic to the Xingu River basin in Brazil and prefers rocky bottoms. It is sometimes kept in aquaria. "P. leopoldi" reaches up to in disc width, in total length and in weight. Females grow larger than males. It is closely related to the similar "P. henlei" from the Tocantins River
American River Aquatic Reserve American River Aquatic Reserve American River Aquatic Reserve is a marine protected area in the Australian state of South Australia located on the north coast of Kangaroo Island in waters of the coastal lagoon known as Pelican Lagoon. American River Aquatic Reserve which is also called the Pelican Lagoon Aquatic Reserve in some sources was declared on 30 November 1971 under the "Fisheries Act 1971" and was re-proclaimed in 2007 following the enactment of the "Fisheries Management Act 2007". It is reported as being the oldest operating aquatic reserve created under fisheries legislation in South Australia. The purpose of the