Scuba diving California's best artificial reef — Eureka oil platform — combines the rugged steel of oil rigs with an abundance of marine life.

Rick MacPherson's tireless efforts to address global threats to coral reefs and empower traditional communities that are dependent on their coastal ecosystems to conserve their resources has earned him the honor of Sea Hero of the Year.

Whether you're a seasoned veteran or an inexperienced diver, REEF Volunteer Survey Projects will change the way you dive.

A swarm of jacks in Cabo Pulmo Park, Mexico, dwarfs an underwater photographer in a phenomenal courtship display.

Want to know where you can scuba dive with goliath grouper? Another wondrous spawning season for goliath grouper has come and gone in Florida, but goliaths, the largest grouper in the Atlantic, are known to return to the same sites like clockwork, so divers can witness the event every year.

Gray reef sharks explore the Ray of Hope shipwreck in Nassau, Bahamas. Watch these divers get up close and personal with a swarm of gray reef sharks.

Stunning video from Nat Geo: When tide and current turn a tiny bay into a bowl of plankton, manta rays in the Maldives gather for a roiling, whirling feast.

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Nudibranch lovers can embark on the fifth annual Nudibranch Safari on Norway next year. Underwater photographer Christian Skauge will be leading the workshop as divers and photographers learn more about nudibranch biology and collect them for research.