Dominik Fretz took his Trident to Isla Guadalupe to help shark researchers. Watch the video for a close-up view of a Great White Shark bite.

Every year, high above the arctic circle, groups of orcas and humpback whales come to feed in the fjords of Norway.

To celebrate World Oceans Day, National Geographic Australia took their online communties below the surface off the coast of Sydney to illuminate the underwater world below.