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The Secret Sex Life of Fish
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Shows how recent DNA research has cast doubt on the theory that sponges were the first...
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During the winter full moons Nassau grouper gather in large numbers to spawn. Most of the...

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Tiger sharks are the ultimate apex predators. Scientists use satellite tags and DNA...
Changing Seas  ·  Episode 704

The Secret Sex Life of Fish


Most people are familiar with the pretty tropical fish found in aquariums, but few realize that some of these animals are capable of changing sex. Discover the unique ways of how some fish species do this and why they likely evolved this way.

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