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Changing Seas

Season 7 • Episode 3 • Billfish: Battle on the Line?

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Changing Seas Season 7, Episode 3: Billfish: Battle on the Line?

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The unique oceanographic conditions of the eastern tropical Pacific make the area one of the best spots in the world for big game anglers to hook billfish. But intense pressures from commercial fishing operations have taken their toll on the numbers of sailfish and marlin in the region. Researchers are studying the animals to provide the data necessary to protect the fish populations from further decline. Watch Changing Seas Season 7, Episode 3 Billfish: Battle on the Line? in HD free online. Enjoy high-quality streaming of Changing Seas Season 7, Episode 3 and share your thoughts in the comments below!

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Episodes

4 episodes
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Sea Turtles: The Lost Years

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Grand Cayman's Famous Stingrays

Each year, thousands of tourists interact with the tame southern stingrays that congregate in the shallow waters of Grand Cayman’s North Sound. Famous marine artist and scientist Dr. Guy Harvey has assembled a research team to study what impact the ecotourism might have on the wild fish.
3

Billfish: Battle on the Line?

The unique oceanographic conditions of the eastern tropical Pacific make the area one of the best spots in the world for big game anglers to hook billfish. But intense pressures from commercial fishing operations have taken their toll on the numbers of sailfish and marlin in the region. Researchers are studying the animals to provide the data necessary to protect the fish populations from further decline.
4

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.