Check out this video from an underwater photographer as he comes face to face with a deadly leopard seal. You'll be surprised by what happens.

This scuba diver has dedicated her life to conservation work in the South Pacific and was instrumental in the development of the Cook Islands Shark Sanctuary.

If you're looking for underwater photography, these diving photos are the best of the best. Take a look at the winners of Scuba Diving Magazine's 2013 Photo Contest!

Wide-angle lenses, fast shutter speeds and good spatial awareness all are key in capturing great pictures of sharks.

Dive a wall and you’ll know anything can happen. In fact, the deeper the wall plunges, the greater the odds of swimming with the unexpected — from sharks to any number of pelagics.

Shark Angels founder and shark activist Julie Andersen shares why you should do as she says — and not as she has done.