Lovers of pelagic diving will be wowed by the encounters in Mexico’s Revillagigedo Archipelago. Here are the best dive sites and how to reach these remote waters.

Channel Islands National Marine Sanctuary, often described as the “Galapagos of North America,” is home to incredible marine wildlife, kelp forests, and maritime heritage artifacts, and contains waters that sustained Chumash people since time immemorial.

In this edition of “Ask a Marine Biologist,” Dr. David Shiffman discusses one of the ocean’s most likable echinoderm.

Personalities abound underwater—if you’re paying attention. See how one scientist changed their approach to navigating the depths by starting to think of fauna as friendly encounters, not just subjects to be documented.

Sea Turtle, Inc., is on a decades-long mission to protect the South Padre Island turtle population from threats to their nesting grounds and more.

Corals in the Florida Keys are being ravaged by warming waters, diseases, overfishing, storms and more. Here's how some people are banding together to give them a fighting chance.

Few ocean critters are more charismatic than captivating cephalopods—squid, octopuses, cuttlefishes, nautiluses—and as divers, we can't get enough.