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How to Identify Mountainous Star Coral

Sharpen your coral-ID skills with these expert tips on how to identify mountainous star coral, or Orbicella Faveolata.

How to Photograph Over/Under Split Shots

Pro underwater photography tips for nailing over/under split shot photos.

How to Prepare for Cold-Water Diving

From the preserved ­shipwrecks of the Great Lakes to the critter-­filled currents of British Columbia, the kelp forests of California, the wreck graveyards of Scotland’s Scapa Flow and the icebergs

How To Improve Scuba Diving Safety with Checklists

How to use pre-dive checklists to improve scuba diving safety and more.

How To Improve Focus in Underwater Photography

Pro tips for improving focus in underwater photography.

How To Identify Rose Coral

Sharpen your coral identification skills with these tips on how to identify rose coral.

Fish ID Tips for Scuba Divers

Fish-ID tips from Ned and Anna DeLoach, who offer fish-ID memory aids for scuba divers.