Here’s what you can do to help those affected by Hurricane Irma and Hurricane Maria - which have devastated many parts of the Caribbean and Florida.

The Beuchat V First was our Best Buy for scuba diving regulators under $400 in ScubaLab's 2017 regulator test. See what made this regulator stand out.

With top scores in its category for dry, easy breathing, the Oceanic Delta 5 regulator was our Testers Choice for regulators under $600.

The Aqua Lung Calypso was our Testers Choice for scuba regulators under $400 in ScubaLab's 2017 regulator test. See what made this reg a winner.

These divers had the experience of a lifetime interacting with playful gray seals off the east coast of the United Kingdom in the Farne Islands.

A Croatian diver builds an underwater wine cellar in the Adriatic Sea.

We think turtles are the best reptiles around, and based on the number of stunning turtle photos entered in our reader photo contest, it seems like underwater photographers agree! Here are eight of our favorite turtles from the 2017 Through Your Lens photo contest.

Watch the incredible footage of massive Australian giant cuttlefish as they mate and migrate.

Over/under photos capture the best of both worlds: terrestrial and aquatic. Here are our favorite split shots from the 2017 Through Your Lens reader photo contest.