In the mighty Amazon, giant snakes, vicious piranhas, prehistoric reptiles, and other fearsome creatures wait in the fresh water. Welcome to Brazil.

Interview with National Geographic Photographer Brian Skerry on saving the ocean and what it feels like to be honored as a Sea Hero.

Corals in motion: You won't believe this amazing underwater timelapse video. Earth is amazing.

Want to swim with whales? Here are the best places to get in the water with sperm whales, the largest toothed predators in the world.

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Freediver has the encounter of a lifetime with seals in Cape Town, South Africa. Watch the video now!

Watch underwater photographer Thomas Peschak on TED Talks as he discusses his work and marine conservation.

When photographing in the cenotes of Mexico's Riviera Maya, we've got some tips for getting stunning underwater photos.

Want to improve your photos when there are lots of animals in the shot? Here's how you can take better underwater photos of multiple subjects.