Page 50 - Wonderful Creatures: Children! Have You Ever Thought ?
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WONDERFUL CREATURES
HOW DO FISH LIVE IN WATER?
You must have seen how fast and brisk fish are in water. In order
to swim, a fish does not need to make any movement other than
to flap its tail from side to side. This ease of movement that fish
have in water is a result of their flexible backbones as well as some
systems in their bodies.
A fish expends a large amount of energy while swimming. This is
not because it swims fast for long times. Fish need considerable
amounts of energy in order to reach high speeds from being sta-
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