Guests on the Cocos Island Aggressor will find countless marine treasures in this legendary destination.

Sharks, whales, manta rays and other pelagic delights abound from the Bahamas to Australia.

A fishing ban led to a recent resurgence of tiger sharks off Costa Rica’s Cocos Island. But experts say it will take more to restore harmony among the area’s apex predators.

Great dive locales to encounter major marine life, as ranked by our readers.

With careful planning and a bit of luck, some divers get the chance to see hundreds or even thousands of rare animals underwater at once.

Scuba diving destinations you can only experience through a liveaboard excursion.

Marine protected areas you can dive, from California to Indonesia.

With rugged landscapes and creatures big and small, it's no wonder divers are drawn to Costa Rica's Isla Del Coco.

The Golden Triangle is a haven for hammerhead sharks. But these large pelagics are under a major threat to long-line fishing unless we help.