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Training Articles

Ask DAN: What Is Oxygen Toxicity, and How Can Divers Avoid It?

Oxygen toxicity is one of the most significant dangers nitrox divers face, but fortunately it’s easily preventable.

How to Remove Backscatter From Photos Using Photoshop

Erin Quigley explains how to use two techniques in Photoshop to remove backscatter from your underwater images.

How to Identify Mycedium Elephantotus Coral

Learn how to identify key coral species like the *Mycedium Elephantotus* coral, more commonly known as elephant nose coral.

Point of No Return

A scuba diving instructor makes a series of mistakes that ultimately cost him his life, in the latest installment of Lessons for Life.

What it's Like to Free Entangled Humpbacks

Rescuers rely on the help of the on-water community to report entangled humpback whales.

How to Build a Community of Dive Buddies

Four reasons to consider building your own personal diving community.

Why Sea Urchins are Important in the Caribbean

Researchers at the Tela Marine Research Center explain the different types of Diadema and their importance in different regions.