Vibrant soft coral colonies grow on a reef dropoff in Lembeh Strait, Indonesia. This area is known for its spectacular marine biodiversity.

A school of Bluegill and Sunfish appear to swim toward the light from above over the Morrison Springs cavern dropoff at the state park in northwest Florida.

A deep dropoff at Grand Canyon called Loki's Abyss east of Thor's Hammer Overlook, with Loki's Rock just right of center, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Green Turtle, Chelonia mydas, Short Dropoff, Micronesia, Palau

Crinoid sit on Sea Fan, Short Dropoff, Micronesia, Palau

A group of divers and a manta ray (Manta alfredi) on one of the corners of the Backwall at Molokini Marine Preserve, Maui, Hawaii, United States of America

Aerial view of the town of Colonia and Tomil Harbour on the island of Yap, Yap, Federated States of Micronesia.

Divers explore a drop off covered with sponges and gorgonian and alcyonarian coral, Philippines

The Backwall at Molokini Marine Preserve drops down to 300 feet. Various reef fish stick close to a crevice here, Molokini, Maui, Hawaii, United States of America

Trumpetfish camouflage behind Harlequin Sweetlips, Auostomus chinensis, Plectorhinchus chaetodonoides, Short Dropoff, Micronesia, Palau

Striped Razorfish, Aeoliscus strigatus, Short Dropoff, Micronesia, Palau

Swimming Flatworm, Pseudoceros spec., Short Dropoff, Micronesia, Palau

Swimming Flatworm, Pseudoceros spec., Short Dropoff, Micronesia, Palau

Trumpetfish hiding behind White-lined Grouper, Auostomus chinensis, Anyperodon leucogrammicus, Short Dropoff, Micronesia, Palau

Crinoid sit on Sea Fan, Short Dropoff, Micronesia, Palau

Trumpetfish hiding behind White-lined Grouper, Auostomus chinensis, Anyperodon leucogrammicus, Short Dropoff, Micronesia, Palau

Green Turtle, Chelonia mydas, Short Dropoff, Micronesia, Palau