Blue Realm

Divers test the limits of shark and human interaction with lemon, bull and white sharks; a feeding frenzy of more than 100 reef sharks in the Bahamas.

The remote and barren Socorro Islands offer little refuge to humans, but they are a magnet to migrating fish, whales and large sharks. This program focuses on the archipelago's most intriguing residents, giant manta rays, their unusual behavior and surprising intelligence.

Endangered manatees are killed.

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 one of the few places in the world where killing a shark is illegal.