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 Endangered Species Preservation Act of 1969 was largely an expansion of the Lacey Act of 1900. In 1969, it was amended to protect species beyond game and wild birds. It granted protection to amphibians, reptiles, mollusks, and crustaceans, groups previously unprotected by any U.S. law. It also expanded the maximum punishment for poaching to a possible $10,000 and up to a year of jail time. In addition, it established two lists into which endangered species could be sorted, foreign and domestic. The act then allowed for species on the domestic list to be given extra protection by United States agencies