Season 9 Episodes
 
  Majestic Mantas Majestic Mantas
Episode 904:
The remote Revillagigedo Archipelago off Mexico’s Pacific coast is a hotspot for giant mantas that interact with awe-struck scuba divers. Scientists are studying the local population using photo ID techniques and acoustic tags which track the movements of these mysterious fish. They are also conducting experiments to see if the filter-feeding rays are impacted negatively by microplastics, tiny pieces of toxic trash that float in the ocean.
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  The Fate of Carbon The Fate of Carbon
Episode 903:
For millennia, the exchange of CO2 between the oceans and atmosphere has been in balance. Now, with more anthropogenic carbon-dioxide in the atmosphere, the oceans are taking up more CO2 as well. This additional CO2 is negatively impacting sensitive ecosystems through a process called ocean acidification, and scientists worry how changes to the ocean environment will affect the way carbon is cycled through the seas.
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  Toxic Algae: Complex Sources and Solutions Toxic Algae: Complex Sources and Solutions
Episode 902:
Lake Okeechobee was once the blue heart of Florida, pumping fresh water down to the Everglades and beyond. But now that a dike and canal system control its flow, water releases from the lake periodically create putrid mats of blue green algae. Scientists think water pollution is to blame, and if something isn’t done about it there could be irreparable damage to the environment, the local economy and people’s health.
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  The Future of Seafood The Future of Seafood
Episode 901:
It is estimated there will be two billion more people on the planet by mid-century. To feed this booming world population, more fish will need to be farmed than ever before. One way to increase fish production in a sustainable way is to move aquaculture operations offshore – where there is plenty of available space and strong currents flush out the pens to avoid polluting sensitive ecosystems.
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Season 8 Episodes
 
  Beneath the Bridge Beneath the Bridge
Episode 804:
The Blue Heron Bridge in Riviera Beach, Florida, is known as one of the best shore dives in the United States. What appears as an unlikely dive site at first is home to a rich variety of marine life, ranging from tiny nudibranchs to manta rays. Underwater photographers are documenting what lives beneath the bridge, and a scientist is studying how two species of octopus co-exist there.
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  Manatees: Conserving a Marine Mammal Maug’s Caldera: A Natural Laboratory
Episode 803:
A Co-Production with Open Boat Films
In the remote Pacific, the islands of Maug rise out of the sea. Formed by an ancient volcano, shallow hydrothermal vents are found close to coral reefs inside the submerged caldera. These vents emit levels of CO2 that can be expected in the world’s oceans by the end of the century, making these waters a natural laboratory for scientists studying the impacts of ocean acidification on coral reefs.
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  Manatees: Conserving a Marine Mammal Manatees: Conserving a Marine Mammal
Episode 802:
Every winter, hundreds of manatees aggregate at Crystal River, Florida, attracted by the warmer, clear waters. This sanctuary is also a treasure for scientists, who take advantage of these manatee gatherings to study them. From decades of visual ID studies to the most cutting-edge DNA research, experts hope that science will help conserve this beloved marine mammal.
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  Sponges: Oldest Creatures in the Sea? Sponges: Oldest Creatures in the Sea?
Episode 801:
Until recently there was scientific consensus that sponges were the first animals to branch off the “Animal Tree of Life,” a kind of family tree for all living and extinct animals on earth. But recent DNA research has cast doubt on that theory, with some scientists suggesting that ctenophores, also known as comb jellies, are an older lineage.
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Season 7 Episodes
 
  The Secret Sex Life of Fish The Secret Sex Life of Fish
Episode 704:
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.
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  Billfish: Battle on the Line? Billfish: Battle on the Line?
Episode 703:
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.
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  Grand Cayman's Famous Stingrays Grand Cayman's Famous Stingrays
Episode 702:
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.
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  Sea Turtles: The Lost Years Sea Turtles: The Lost Years
Episode 701:
After sea turtle hatchlings emerge from their nests, they vanish into the sea. Until recently, their journey was largely shrouded in mystery. Now, as technology advances, researchers are beginning to understand where turtles go during their so-called “lost years.”
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Season 6 Episodes
 
  Coastal Carnivores Saving Sawfish
Episode 604:
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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  Galapagos Galápagos: Windows into the Future
Episode 603:
The unique oceanic conditions of the Galápagos Islands serve as a perfect natural laboratory to study how climate change may impact corals in the future.


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  Mysterious Microbes Biggest Fish in the Sea
Episode 602:
Each summer, the world’s largest known aggregation of whale sharks occurs just off the coast of Cancun, Mexico. Hundreds of these gentle giants come to the area to feed on plankton, giving experts the opportunity to learn more about the largest fish in the sea.
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  Living Fossils Living Fossils
Episode 601:
In the deep, dark waters off the coast of Roatan, Honduras, strange flowerlike animals flourish. These sea lilies and feather stars, known as Crinoids, have been around in various forms since before the age of dinosaurs.
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Season 5 Episodes
 
  Coastal Carnivores Reefs of Rangiroa
Episode 504:
Scientists with the Global Reef Expedition are on a six year mission to study remote coral reefs around the world.  Organized by the Khaled bin Sultan Living Oceans Foundation, the expedition kicked off in 2011, with plans to conduct research in the Atlantic, Pacific and Indian Oceans. 
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  Grouper Moon Creatures of the Deep
Episode 503:
In the cold, deep waters of the Gulf of Mexico, little-known animals spend their entire lives in near darkness, far removed from our human world.  Until now, little research has been conducted on these creatures of the deep, keeping much of their lives a mystery.  


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  Mysterious Microbes Sunken Stories
Episode 502:
The oceans are a graveyard of man’s seafaring adventures. Today, underwater archaeologists are scouring the seafloor for clues to our maritime past.
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  Tracking Tigers Coral Hybrids
Episode 501:
Once a common sight in the Caribbean and Florida, Elkhorn and Staghorn corals are now listed as threatened on the U.S. Endangered Species list.   But while these corals have declined in recent years, their hybrid appears to be increasing in parts of the region.    
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Season 4 Episodes
 
  Coastal Carnivores Coastal Carnivores
Episode 404:
Symbio Studios
Scientists studying the coastal Everglades have made some perplexing discoveries. Bull sharks are living upstream where alligators should thrive, and gators are swimming out to the ocean to feed.
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  Grouper Moon Grouper Moon
Episode 403:
During the winter full moons, Nassau Grouper gather in large numbers to spawn. Most of the known spawning sites have been fished out, but the Cayman Islands are home to the last great reproductive population of this endangered species.
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  Mysterious Microbes Mysterious Microbes
Episode 402:
On coral reefs, microorganisms are copious creatures. Throughout Florida, scientists painstakingly work to identify key players within this microbial community and directly link a devastating coral disease to a human pathogen.
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  Tracking Tigers Tracking Tigers
Episode 401:
Tiger sharks are the ultimate apex predator.  Scientists use satellite tags and DNA forensic tools to better understand the migrations of this magnificent species and to investigate the impacts of the world shark fin trade.  
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Season 3 Episodes
 
  After the Spill After the Spill
Episode 304:
The catastrophic oil spill in the Gulf of Mexico in April 2010 may no longer make headline news, but the story is far from over. Oceanographers continue to study the long-term effects this disaster might have on marine ecosystems.
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  Prescription: Oceans Prescription: Oceans
Episode 303:
The oceans are part of America’s newest medical frontier. In Florida, scientists are studying a variety of marine invertebrates which may hold the key to unlocking the secrets of our own biology.
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  Reef Revival Reef Revival
Episode 302:
In the emerging science of coral reef restoration, marine biologists and resource managers are discovering naturally occurring mechanisms that promote coral growth and restore ecological balance in these gardens of the sea.
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  Alien Invaders Alien Invaders
Episode 301:
In the waters of the western Atlantic and Caribbean, a voracious alien predator has taken hold. Native to the Indo-Pacific, the invasive lionfish is a major threat to biodiversity and the health of already stressed coral reef ecosystems.
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Season 2 Episodes
 
  Sinking the Vandenberg Sinking the Vandenberg
Episode 204:
In the turquoise blue waters of the Florida Keys, a new attraction is drawing scuba divers from around the world: The USNS General Hoyt S. Vandenberg.
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  Seagrasses and Mangroves Seagrasses and Mangroves
Episode 203:
They are an ancient species of flowering plants that grow submerged in all of the world’s oceans. Seagrasses link offshore coral reefs with coastal mangrove forests.
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  Sentinels of the Seas Sentinels of the Seas
Episode 202:
Bottlenose dolphins are a beloved Florida icon. But, recent studies show disturbing signs of immune system dysfunction and disease plaguing this charismatic mammal.
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  No Fish Left Uncounted No Fish Left Uncounted
Episode 201:
How do you count two fish, three fish or even a school of fish? In Dry Tortugas National Park, located 70 miles from Key West, Florida, a group of scientists have joined forces to conduct a massive fish census.
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Season 1 Episodes
 
  Farming the Sea Farming the Sea
Episode 104:
An ever-growing demand for fresh seafood has pushed wild stocks around the world to the brink. Aquaculture is one alternative to wild-caught fish.
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  Corals of the Deep Corals of the Deep
Episode 103:
In the deep waters off Florida’s Atlantic coast grow magnificent structures, capable of reaching 300 feet in height. These are the corals of the deep sea.
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  Mission to Inner Space Mission to Inner Space
Episode 102:
NOAA’s Aquarius Reef Base is the only undersea research station operating in the world today where aquanauts carry out missions while living and working on the seafloor.
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  Super Grouper Super Grouper
Episode 101:
At a time when large fish are rapidly disappearing from the world's oceans, one giant is making a comeback in Florida - the Goliath Grouper.
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