{68} Genius Platanista- the river Dolphins
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QI: Do Asia's river dolphins have eyes? Q2: How do they catch their prey? Q3: What distance, they can see a finger-sized fish from? Q4: At the surface of the river, what method do they use to catch a fish? Q5: How do they catch their prey at the middle depths? Q 6 What is the use of their snout-whiskers? Ans---- 1--- Yes, but they are nearly blind. 2---They use echolocation to navigate and catch fish. They can listen for surface-swimming fish and sense electrical signals emitted by bottom-dwelling prey on the riverbed. The small clicks they produce underwater echo back at them thus they identify prey and obstacles on their path. 3---From 20 km. away 4---They listen for fish movement. 5---At the middle depths they prefer echolocation 6---- With the help of whiskers, they can sense weak electrical signals emitted by bottom-dwelling fish and shrimp, especially in calves.