Marine Mammal Protection Act Indian manatee, sea otter, polar bear, and Pacific walrus. Species not present in U.S. waters include the West African and Amazonian manatee, dugong, Atlantic walrus, and marine otter. In efforts to conserve and manage marine mammal species, the Service has appointed field staff dedicated to working with partners to conduct population censuses, assess population health, develop and implement conservation plans, promulgate regulations, and create cooperative relationships internationally. Various Marine Mammal Management offices are located on either coast. The Service's Marine Mammal Management office in Anchorage, Alaska is responsible for the management and conservation of polar bears, Pacific walruses, and northern
Australian Fossil Mammal Sites (Riversleigh / Naracoorte) Australian Fossil Mammal Sites (Riversleigh / Naracoorte) Australian Fossil Mammal Sites (Riversleigh / Naracoorte) is a combined listing in the UNESCO World Heritage Sites for two places in Australia known for their extensive fossil remains. The UNESCO listing is for two separate areas where fossils from the Cainozoic era have been found: Riversleigh and Naracoorte are considered to be among the world’s 10 greatest fossil sites and both locations are notable for the extreme diversity and quality of preservation of their fossils, which illustrate the evolution of mammals in Australia over the last 20 million years and demonstrate how marsupials