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Marine Life | |
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IntroductionWhen fish swim, it is like flying under water. Water is thicker than air and harder to move through.Unlike birds in the air, fish in the water can float without moving.
How Fish SwimThey move through the water by moving their fins back and forth. When swimming, the fish uses its side fins to steer. It uses its tail like a propeller to push it forward.Many fish have long thin (streamlined) bodies to help them swim fast. They may also have slimy skin to help it slide quickly through the water. Other fish are flat and live on the bottom of the ocean. They move their fins in a wave-like motion (up and down) to move forward. The tail helps the fish move very fast through the water. Fish move their tails side to side.
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