Back to Show
Changing Seas
Billfish: Battle on the Line? - Trailer
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 populations from further decline.
Support Provided By

Unlock with PBS Passport
26:42
Florida’s gentle giants are dying in record numbers.

Unlock with PBS Passport
26:42
Experts are working to conserve and restore the Puget Sound’s declining kelp forests.

Unlock with PBS Passport
26:42
Scientists study the body size and health of humpback whales across their migratory cycle.

26:42
Experts study declines in the number of humpbacks migrating between Alaska and Hawaiʻi.

Unlock with PBS Passport
26:47
Scientists employ creative solutions to restore and reconnect Florida’s mangroves

Unlock with PBS Passport
26:47
The deep-sea submersible Alvin brings explorers to extraordinary places.

Unlock with PBS Passport
26:42
Scientists study salt marshes along scenic coastlines in the South.

26:42
Scientists team up with anglers to study the survival rates of the fish.

Unlock with PBS Passport
26:53
Scientists study what makes certain corals more resilient than others.

Unlock with PBS Passport
26:42
Scientists monitor penguin populations and study the animals’ interaction.

Unlock with PBS Passport
26:42
Scientists study the devastating impacts of the Deepwater Horizon oil rig disaster.

Unlock with PBS Passport
26:42
Scientists set out to uncover the mysteries of blue holes.