Avoid harming the ocean as an underwater photographer by perfecting your buoyancy, using flash mindfully and encouraging good behavior fellow dive travelers.

Walking sharks are millions of years old, there's no reason to panic about the "new" ones recently discovered.

Extend your bottom time by learning how to use enriched air, also known as nitrox.

A liveaboard diver maxes out his bottom time for days in a row, landing him in the hospital with decompression sickness. His dive buddy experiences no symptoms, showing why it’s best to dive conservatively — you never know how your body will react.

A diver ignores a DCS symptoms, including a rash—an increasingly common sign of being bent.

Early-onset Alzheimer's complicates — but can't stop — diving for this determined diver and her loving husband.

The PADI Divemaster course is a starting point for many scuba diving jobs. It covers the physics and physiology of diving to in-water safety, diver supervision and the business of diving.

Learn where nudibranchs live and aim for a super macro shot that highlights the sea slug’s unique features.

Tips to prepare the kids and teens in your life to become divers, and what should you look for in the dive center or trip operator you choose for their journey.