Sam Gruber's team of biologists capture, tag and release a juvenile tiger shark. Then they track it electronically into the mangroves, an ideal location for their research.

Gruber's team of researchers work day and night. In this episode they record a shark's vital statistics while it's in a state of tonic immobility. Before releasing it, they take a DNA sample. Enjoy!

At times, Doc Gruber's research requires the team to dive right into shark-infested waters! Their line of work certainly isn't for the faint of heart! Enjoy.

Nathalie and Jim get up close and personal with tiger and lemon sharks, trying to get the best footage while taking care not to disturb or excite the dangerous animals.

The team's divers conclude their filming and come back to the surface unharmed. We learn more about current developments in the prevention of shark attacks.

In this episode, Doc Gruber and a colleague are testing a shark repellent. If effective, it could help save the lives of divers, swimmers and surfers all over the world.

Here's some more stunning underwater footage. This time it's hammerhead sharks and stingrays, a wahoo and some striped eels, all filmed near the Cocos Island in the Caribbean. Take a look!

Samuel Gruber's team films white-tipped sharks and barracuda feeding at night off Cocos Island. Enjoy!

The trailer for this documentation shows the mistreatment of sharks by humans. We are reminded that sharks also form a part of nature and as such play an important role and need to be protected.

Sharkwater is a documentary about man’s relationship with sharks and about a journey, undertaken by Rob Stewart, in order to explore the life of sharks and to find out, why they are being wiped out.

Michael Fishbach narrates his encounter with a humpback whale entangled in a fishing net. Gershon Cohen and he have founded The Great Whale Conservancy to protect whales. Join them in helping to save these magnificent creatures.

View part two from the Great Whale Conservancy of this exhilarating encounter with a humpback whale rescued off the shores of Mexico. Enjoy!

Eco the Butterfly stars in this 60-second spot now airing on some PBS television stations. It made its debut on PBS affiliate WXXI in Rochester, NY.

In this first of two segments, learn valuable information regarding bottled water: its origin, its marketing to the masses and its effect upon our environment.

In this second of two segments, learn about the alternatives to bottled water and what you can do to help protect our environment.