South Asian river dolphin The sphincter-like structure is capable of sensing light, and may be able to sense the direction from where the light was emitted. However, the muddy waters, or low light conditions, that the "Platanista gangetica" inhabit negate the use of the little vision that remains. The Ganges subspecies shows object-avoidance behavior in both the consistently heavily murky waters of its habitat and in clear water in captivity, suggesting that it is capable of using echolocation effectively to navigate and forage for prey. However, there is limited information on how extensively vocalization is utilized between individuals. This subspecies of river dolphin is
Endangered Species Act of 1969 such as the U.S. Fish and Wildlife Service. It also stated that species on the foreign endangered list could not be brought into the United States. The 1969 act further amended other existing laws to prohibit throughout the United States the sale or purchase by any person of any domestically endangered species or part or product thereof that was taken in any manner in violation of the laws or regulations of a state or foreign country. It also established the framework for the Convention on International Trade in Endangered Species of Wild Fauna and Flora, or CITIES which, "accords varying