Answers

  • Brainly User
2015-11-20T17:13:08+05:30
Its an adaptation created over time in order to help them maneuver through their environment. Evolution to be frank.

That's the reason why do fishes have streamlined body...... 
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2015-11-20T19:17:30+05:30
Streamlined body helps fishes to swim more efficiently and with more speed and to reduce force to swim in forward direction.
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Hope it may help you... :)
**help fishes** correction in my answer.. :)