Coral-covered underwater walls are some of the coolest dive sites, and are filled with sea creatures big and small. Here are 15 best in the world to go dive!

See what happens when this manta ray "asks" scuba divers for help! Just another reason to keep debris and pollution out of our seas.

The answer is siphonophores — the glowing underwater creatures you see night diving in Hawaii and Tahiti — and they change the design of underwater propulsion.

Looking for the best dive sites in Florida? Here's our weekend itinerary for an epic weekend for scuba divers in Palm Beach County, Florida.

How do you find small or camouflaged animals during a dive? Here are five expert tips to help you see these hidden wonders.

What you don't know about swimming with oceanic whitetip sharks won't hurt you — right? Find out about diving with these fish in the Bahamas.

Do you want to help save manta rays around the world? Take action with the Manta Trust to help conserve our ocean planet!

It may not be Swamp Thing, but this prehistoric whale skull is a creature from another world. Read how one lucky diver discovered it!

Forget SeaWorld, scuba diving with Killer whales — aka orca whales — is the best encounter you can have. Find out where to dive with these massive toothed predators.