Amazon river dolphin widespread river dolphins. They are present in six countries in South America: Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela, in an area covering about . The boundaries are set by waterfalls, such as the Xingu and Tapajós rivers in Brazil, as well as very shallow water. A series of rapids and waterfalls in the Madeira River have isolated one population, recognized as the subspecies "I. g. boliviensis", in the southern part of the Amazon basin in Bolivia. They are also distributed in the basin of the Orinoco River, except the Caroni River and the upper Caura River in Venezuela. The
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