Fun facts about the siphonophore: its size, its species, the longest siphonophore on record and more!

Our annual Readers' Choice Awards name the world's best diving based on input from thousands of divers.

We polled thousands of divers—they say these places have the best diving in the world.

Micro-nekton caught in benthic geography are supporting a food chain in a never-before-seen environs more than 1,600 feet deep.

The novice freediver shares what it took to dive Greenland’s ice for his personal mental health and to inspire others to face their own struggles.

Barge 129, the last missing Great Lakes whaleboat, was identified by a team of researchers, ending a more than century search for the wreckage.

Peer inside seaweed, seashells, coral reefs, algae and eels with this collection of books about the ocean.

In the wake of Florida reopening its goliath grouper fishery, the co-owner of Pura Vida Divers secured protections for its aggregation sites.

Dan Metcalfe is waiting for Guinness World Records to certify his swim—more than 17,000 feet underwater—as the longest within his disability category, along with two other record attempts.