“They really are the gentle giants of the ocean,” says Shari Sicsko, co-owner of Kona Snorkel Trips, which offers its world-famous manta ray night snorkel year-round. “Everybody’s really passionate ...

Hawaii's Big Island is known for things like coffee farms, scenic vistas, and breathtaking volcano Kīlauea. It's also got some of the best snorkeling spots to see turtles, fish, and all sorts of sea ...

Floating face down in the dark ocean, I see a shadow approach from the depths below. As the creature nears, its enormous size is revealed—10′ across from tip to tip. With grace, the giant manta ray ...