Changing Seas

Vanishing Whales
S14 Ep1401 | 26m 42s

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

Humpback Health
S14 Ep1402 | 26m 42s

Scientists study the body size and health of humpback whales across their migratory cycle.

Kelp: Hidden Treasure of the Salish Sea
S14 Ep1403 | 26m 42s

Experts are working to conserve and restore the Puget Sound’s declining kelp forests.

Saving Florida’s Starving Manatees
S14 Ep1404 | 26m 42s

Florida’s gentle giants are dying in record numbers.

Recreational Shark Fishing: Collaborating for Conservation
S13 Ep1 | 26m 42s

Scientists work with shark anglers to study if recreational fishing is having an impact.

At the Water’s Edge: The Salt Marsh
S13 Ep2 | 26m 42s

Researchers study one of America’s iconic landscapes – the salt marsh.

Alvin: Pioneer of the Deep
S13 Ep3 | 26m 47s

Upgrades to the storied deep-sea submersible Alvin will take it deeper than ever before.

Habitats: The Key to Florida’s Fisheries
S13 Ep4 | 26m 47s

Scientists study and restore juvenile tarpon and snook habitat in Florida.

Florida’s Blue Holes: Oases in the Sea
S12 Ep1 | 26m 42s

Scientists explore mysterious blue holes scattered throughout the Gulf of Mexico.

A Decade After Deepwater
S12 Ep2 | 26m 42s

A decade after the Deepwater Horizon oil spill, experts still study its harmful impacts.

Peru’s Desert Penguins
S12 Ep3 | 26m 42s

Scientists study the adorable Humboldt penguins that nest along Peru’s desert coastline.

American Samoa's Resilient Coral Reefs
S12 Ep4 | 26m 53s

Experts study what makes American Samoa’s coral reefs more resilient than reefs elsewhere.

The Cordell Bank: A National Treasure
S11 Ep1 | 26m 42s

Discover California’s Cordell Bank, a little-known ecological Eden.

Toxic Waters
S11 Ep2 | 26m 47s

Scientists study the various harmful algal blooms which are impacting Florida.

Corals in Crisis
S11 Ep3 | 26m 42s

Experts study a new disease that is devastating Florida’s fragile coral reefs.

Mystery of the Humpback Whale Song
S11 Ep4 | 26m 42s

Scientists in Hawaii study the purpose of humpback whale song.

Dolphins: Breaking the Code
S10 Ep1 | 26m 43s

A scientist dedicates her career to studying wild dolphin communication in the Bahamas.

Cryptic Critters
S10 Ep2 | 26m 42s

Researchers investigate a tiny, non-native species on a shipwreck near Key West.

Lords of the Wetlands
S10 Ep3 | 26m 42s

Scientists and conservationists work together to save the American crocodile in Jamaica.

Fishing the Flats for Science
S10 Ep4 | 26m 42s

Experts study bonefish, tarpon & permit, the fishes coveted by fly anglers on the flats.

The Future of Seafood
S9 Ep1 | 27m 18s

Scientists work with the private sector to develop sustainable offshore aquaculture.

Toxic Algae: Complex Sources and Solutions
S9 Ep2 | 27m 13s

Experts study the cause and effects of Florida’s toxic algal blooms.

The Fate of Carbon
S9 Ep3 | 27m 13s

Scientists study how increased levels of CO2 impact how carbon cycles through the seas.

Majestic Mantas
S9 Ep4 | 27m 13s

Scientists study manta rays in Mexico’s remote Revillagigedo Archipelago.

Sponges: Oldest Creatures in the Sea?
S8 Ep1 | 26m 43s

Are sponges the oldest creatures in the sea? DNA research has cast doubt on that theory.

Manatees: Conserving a Marine Mammal
S8 Ep2 | 26m 43s

Each winter, scientists head to Crystal River, Florida, to study manatees gathered there.

Maug’s Caldera: A Natural Laboratory
S8 Ep3 | 26m 43s

The Maug Islands are a natural laboratory for scientists studying ocean acidification.

Beneath the Bridge
S8 Ep4 | 26m 43s

Florida’s Blue Heron Bridge is popular with divers because of its rich marine life.

Sea Turtles: The Lost Years
S7 Ep1 | 26m 43s

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

Grand Cayman’s Famous Stingrays
S7 Ep2 | 26m 42s

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

Billfish: Battle on the Line?
S7 Ep3 | 26m 44s

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

The Secret Sex Life of Fish
S7 Ep4 | 26m 43s

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

Living Fossils
S6 Ep1 | 26m 48s

In the deep sea, strange flowerlike animals flourish in the dark.

Biggest Fish in the Sea
S6 Ep2 | 26m 54s

The world’s largest known gathering of whale sharks occurs just off the coast of Mexico.

Galápagos: Windows into the Future
S6 Ep3 | 27m 2s

Scientists study how climate change may impact corals in the Galapagos Islands.

Saving Sawfish
S6 Ep4 | 26m 54s

Scientists conduct research in South Florida to save the endangered Smalltooth Sawfish.

Coral Hybrids
S5 Ep1 | 26m 45s

A scientist studies coral hybrids to see if they are hardier than their parents.

Sunken Stories
S5 Ep2 | 26m 45s

Underwater archaeologists scour the seafloor for clues to our maritime past.

Creatures of the Deep
S5 Ep3 | 26m 46s

Researchers study the fishes that live in the deep, cold waters of the Gulf of Mexico.

Reefs of Rangiroa
S5 Ep4 | 26m 46s

Scientists are on a six-year mission to study remote coral reefs around the world.

Tracking Tigers
S4 Ep401 | 27m 16s

Scientists use satellite tags and DNA forensic tools to track tiger sharks.

Mysterious Microbes
S4 Ep402 | 29m 33s

Scientists work to identify and link a devastating coral disease to a human pathogen.

Grouper Moon
S4 Ep403 | 27m 1s

The Cayman Islands are home to the last great reproductive population of grouper.

Coastal Carnivores
S4 Ep404 | 27m 14s

Scientists studying the coastal Everglades make some perplexing discoveries.

Alien Invaders
S3 Ep301 | 26m 49s

The invasive lionfish is a major threat to biodiversity and a stressed coral reef.

Reef Revival
S3 Ep302 | 26m 46s

Explore the emerging science of coral reef restoration.

Prescription: Oceans
S3 Ep303 | 26m 46s

A group of scientists tests sea sponges for potential anti-cancer properties.

After the Spill
S3 Ep304 | 26m 47s

Oceanographers continue to study the long term effects of an oil spill.

No Fish Left Uncounted
S2 Ep201 | 26m 51s

The Changing Seas crew shadows a team of research divers in Dry Tortugas National Park.

Sentinels of the Seas
S2 Ep202 | 26m 51s

Take a look at the health of the bottlenose dolphin.

Seagrasses and Mangroves
S2 Ep203 | 26m 48s

Examine the important role seagrasses and mangroves play in the ocean’s web of life.

Sinking the Vandenburg
S2 Ep204 | 26m 49s

Explore the world’s second largest intentionally sunk shipwreck.

Super Grouper
S1 Ep1 | 26m 54s

After being fished to near extinction, Goliath Groupers are making a comeback in Florida.

Mission to Inner Space
S1 Ep2 | 26m 49s

Scientists at the world’s only underwater lab study the impacts of ocean acidification.

Corals of the Deep
S1 Ep3 | 26m 46s

Scientists scan the ocean floor to find deep sea corals threatened by bottom trawling.

Farming the Sea
S1 Ep4 | 26m 45s

Scientists develop sustainable aquaculture methods to take the pressure off wild fish.