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How Do Fish...SWIM?

Fish swim by flexing their bodies and tail back and forth. Fish stretch or expand their muscles on one side of their body, while relaxing the muscles on the other side. This motion moves them forward through the water.

Fish use their back fin, called the caudal fin, to help push them through the water.
The fish's other fins help it steer. Fish have 5 types of fins. They are the pectoral, pelvic, dorsal, anal and caudal fins. Can you memorize their names and where they appear on fish?

Do you swim? What happens if you try to swim using just your body to move, and your arms only to steer?


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