Episode list

Changing Seas

Living Fossils

Tue, Jun 17, 2014
Crinoids have been around in various forms since before the age of dinosaurs. Now experts descend into the deep to study the animals from a submersible.
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Biggest Fish in the Sea
Each summer, the world's largest known aggregation of whale sharks occurs just off the coast of Cancun, Mexico, giving experts the opportunity to learn more about the largest fish in the sea.
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Saving Sawfish

Tue, Jun 24, 2014
Strange and prehistoric-looking, Smalltooth Sawfish were once coveted by anglers as popular trophy fish. But habitat loss and overfishing have greatly reduced the animals' range and landed them on the endangered species list in 2003.
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