Season 7

    Video thumbnail: Changing Seas The Secret Sex Life of Fish

    Changing Seas

    The Secret Sex Life of Fish

    Discover the unique ways some fish species change sex during their lifetime.

    The Secret Sex Life of Fish

    Video thumbnail: Changing Seas Billfish: Battle on the Line?

    Changing Seas

    Billfish: Battle on the Line?

    Researchers study billfish in the eastern Pacific to protect the animals from overfishing.

    Billfish: Battle on the Line?

    Video thumbnail: Changing Seas Grand Cayman’s Famous Stingrays

    Changing Seas

    Grand Cayman’s Famous Stingrays

    Dr. Guy Harvey and his team study the impact of ecotourism on Cayman’s iconic stingrays.

    Grand Cayman’s Famous Stingrays

    Video thumbnail: Changing Seas Sea Turtles: The Lost Years

    Changing Seas

    Sea Turtles: The Lost Years

    Researchers are beginning to understand where sea turtles go during their “lost years."

    Sea Turtles: The Lost Years

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