{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.
          =======================================================

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