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
Leith's softshell turtle Leith's softshell turtle Leith's softshell turtle ("Nilssonia leithii" ) is a species of turtle found in peninsular Indian rivers including the Bhavani, Godavari, and Moyar Rivers. The type locality is Pune in India. The specific name, "leithii", is in honor of Andrew H. Leith, a physician with the Bombay Sanitary Commission. "Nilssonia leithii" is intermediate between "Nilssonia gangetica" and "Nilssonia hurum". It is like the former in the width of the interorbital apace, the comparatively short mandibular symphysis, and the markings of the head. It is like the latter in the longer and more pointed snout, the absence of a