A young married couple celebrate their ten year anniversary by scuba diving in the clear freshwaters of Devil's Den Springs, a sinkhole in Williston, Florida, as the afternoon sun filters down into the cavern.

A scuba diver surfacing and looking up into the light as he ascends from the bottom of Devil's Den, a sinkhole in Williston, Florda.

A technical cave diver using a diver propulsion vehicle (DPV) to dive into the Blue Springs state park cave system near Marianna, Florida.

Fijian dive guide feeds a school of Scissortail Sergeant Major fish, Fiji.

Scuba diver and a common spiny lobster, Bonaire, Caribbean Netherlands.

Scuba diver swims by some large sponges off the coast of Bonaire, Caribbean Netherlands.

Scuba diver propels above a large vase sponge, Bonaire, Caribbean Netherlands.

Scuba diver navigates the waters using a diver propulsion vehicle off the coast of Bonaire, Caribbean Netherlands.

Scuba diver swimming underwater amongst sea sponges, Bonaire, Caribbean Netherlands.

Scuba diver swimming underwater amongst sea sponges, Bonaire, Caribbean Netherlands.

Scuba diver uses a diver propulsion vehicle to navigate the waters off the coast of Bonaire, Caribbean Netherlands.

School of jacks and divers at Liberty Wreck, Bali, Indonesia.

Divers photographing a Giant Grouper, Great Barrier Reef, Queensland, Australia.

Cave exit with three divers, Grotta dei Cirri, Ustica, Italy.

Sea anemone and diver, Red Sea, Egypt.

Technical diver in cave system, Mexico.

Diver using side mount gear in cave in Mexico.

A cavern diver ascends into the light filtering into cenote system at Yucatan Peninsula, Mexico.

Diver spears an invasive Indo-Pacific Lionfish in the Caribbean Sea.

Diver with large purple sea fan, Cariibean Sea.

A gorgonian sea fan (possibly Echinogorgia species) octocoral on a tropical coral reef, in Gaafu Dhaalu atoll, The Maldives, Indian Ocean, Asia

A diver around a Stylophora species hard coral, on a tropical coral reef, in Gaafu Dhaalu atoll, The Maldives. Indian Ocean, Asia

Turtle and Diver

A female diver explores a barrel sponge, St. Lucia.

Scuba Divers Posing Underwater, Ixtapa-Zihuatanejo, Guerrero, Mexico

Two divers swimming along the remaining structure of a shipwreck.

Underwater view of diver wearing wetsuit, diving goggles and oxygen cylinder, air bubbles rising, United States of America

Underwater view of two divers wearing wetsuits, diving goggles and oxygen cylinders, United States of America

Oxygen tanks with water