The Dominican Republic's ancient underground river system is a new frontier in diving for those with the experience and courage to try it.

An air-faring drone captured video of whale sharks and manta rays feasting on plankton off the coast of Isla Mujeres, Mexico — and the lucky snorkelers who joined them!

Did you catch all of the Scuba Diving covers this year? If not, check out our gallery, which includes amazing photos of sharks, wrecks, divers and more.

As a leader in scuba diving vacations, Caradonna Dive Adventures connects travelers with the world’s best dive sites and resorts.

Do you know anything about the octopus? Watch and laugh as comedian Ze Frank narrates this informative video about the underwater creature.

Enjoy these hilarious facts about underwater creatures courtesy of comedian Ze Frank. Think you know all about Seahorses? Think again.

Having a hard time finding Nemo? Check out this showcase of amazing underwater photography featuring anemonefish, all submitted to _Scuba Diving_'s 2014 Through Your Lens Photo Contest!

Is that seal surfing? Watch as two surfers from the U.K. spend nearly an hour surfing with a baby seal.

Whether you're diving or not, everyone loves cetaceans! Check out these incredible underwater photos of whales and dolphins from our 2014 Through Your Lens Photo Contest.