The Blue Realm

Shark Business unravels some of the mysteries surrounding sharks with controversial behaviorist Dr. Erich Ritter. You'll witness divers testing the limits of shark-human interaction outside of cages with dangerous sharks such as lemon, bull and even great white sharks! Recount the events that led to the attack that almost killed Dr. Ritter.

Giants of San Benedicto features Dr. Robert Rubin and his ground-breaking research of giant Mantas.

Tentacles follows Dr. Jennifer Mather as she leads a team of renowned scientists to the beautiful Caribbean island of Bonaire. Their mission is to prove a controversial theory: reef squid speak to each other with a complex language they paint on their skin.

Miracle Venom explores the strange, and often bizarre world of the oceans most venomous animals. Follow Dr. Glen Burns as he handles deadly Sea Snakes with only his bare hands. You'll be amazed at how a small Cone Snail hunts, paralyses and then eats it's prey alive.

Whale sharks can reach nearly 50 feet in length and weigh 30 tons or more! The program also features the remarkable story of the capture and transport of whale sharks to the Georgia Aquarium in Atlanta.

Sharks are BIG business in adrenaline eco-tourism. And some thrill seekers deliberately pursue close encounters with deadly sharks without the protection of a cage. The bigger and more dangerous the shark, the better.

Singing louder than any animal on earth, humpback whales are famous for their haunting songs and jaw-dropping acrobatics. They were hunted to the brink of extinction until a moratorium on killing them was implemented in the 1960s. But after finally rebounding in numbers, whaling nations are exploring ways to re-open the hunt.

Each year, hundreds of critically endangered manatees are killed in U.S. waters by boats, disease and cold weather. 2006 was the worst year on record for manatee deaths 416 animals perished. With only a few thousand remaining in the wild, mostly in heavily developed Florida wetlands, the clock is ticking in efforts to save this amazing mammal from extinction.

They're beautiful - and deadly, with venomous spines that resemble a lion's mane. They're lionfish, a tropical reef species normally found in the Indo-Pacific. Now, they're wreaking havoc in the Caribbean and Atlantic all thought to have descended from a handful of aquarium fish carelessly released into the sea.

Around the globe, thousands of decommissioned naval vessels rot in dockyards. What can you do with these toxic time bombs? One solution is to clean them well, blow them up and sink them! Providing shelter and breeding grounds, countless fish and invertebrates colonize steel hulls.

There's no doubt sharks have an image problem. And they're certainly in trouble globally. The population of some species has declined by more than 90% due to over fishing. But there's still one place in the world where sharks thrive the Bahamas. Sharks not only prosper there, they are highly protected. It's illegal to kill them. Stuart Cove's passion is sharks.

Believe it or not, many scuba divers want to see great whites up close, and photographers want dramatic shots. But how do you get the sharks to where you want them? For decades, it's been done by baiting or chumming attracting sharks with food.

At The Open Water Research Station, free swimming seals and sea lions are observed in their natural habitat. In Alaska, wild stellar sea lions seem to be thriving, but prove to be an aggressive and difficult animal to study and photograph. At the research station, these tame, remarkable animals are providing fresh insights into the fragile ocean food chain of the North Pacific.