In honor of Earth Day, here's a roundup of marine animals that help us fight climate change and help the entire planet.

Photographs of marine animals can educate and inspire. In this edition of “Ask a Marine Biologist,” Dr. David Shiffman discusses whether taking those photos hurt the animals.

From rocky outcrops in the Sea of Cortez to exotic islands in the South Pacific, here are the best places to dive with playful sea lions.

Whether you're a beginner or an experienced photographer, these tips and tricks will help you create stunning images of these underwater wonders.

The Galapagos Islands are not just famous for their shark-filled waters; they also boast some of the highest levels of endemism on earth.

More than 30 years of marine conservation work led PADI Pro Carl Charter to shift his focus to what really matters: marine education, and creating opportunities for everyone to experience the beaut

These April Fools’ Day marine pranksters mimic, hide and otherwise disguise themselves on April 1 and every day of the year.