In an area of the Pacific known as the heart of the world's marine biodiversity, one island group stands out for its jaw-dropping abundance of life.

These 10 hot spots in the cold Emerald Sea may be the best diving in North America.

When the waves are rocking, don't come knocking. Follow these tips for diving safely in surging water.

Wondering what to give the underwater photographer on your list? Look no further.

The world's foremost marine-life identification authors tackle the planet's most diverse ocean in their groundbreaking new reef fish ID book written for divers.

Submit your photos for Photographer of the Week Peter Andersen Congratulations Peter ...

Submit your photos for Photographer of the Week Elaine Blum Congratulations Elaine ...

#7 2000 lbs. of lead and I'm still floating?

If something went wrong on your next dive, would you be the hero or the helpless bystander?