Watch: The incredible evolution of fish bodies (5 mins).

Lauren Sallan via Ted Ed

Free TED Talk – Speaker: Lauren Sallan

Focus: Fish / Duration: 5 minutes / SuitabilityAll ages

About: Why are fish fish-shaped? In tropical seas, flying fish leap out of the water, gliding for up to 200 meters, before dipping back into the sea. In the Indo-Pacific, a hunting sailfish swims up to 110 kilometers per hour. These feats are made possible by a fish’s form — which in most species is a smooth, long body, fins, and a tail. Lauren Sallan explains why these features are so common, and what it reveals about fish.

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