Chien Lee / Large-eared Horseshoe Bat (Rhinolophus philippinensis), Bintulu, Bukit Sarang Conservation Area, Sarawak, Borneo, Malaysia

Chien Lee / Large-eared Horseshoe Bat (Rhinolophus philippinensis), Bintulu, Bukit Sarang Conservation Area, Sarawak, Borneo, Malaysia

Alex Mustard / Diver blowing bubble rings, while resting on the sand, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea, January 2011.

Alex Mustard / Sand diver (Synodus intermedius) portrait on a coral reef, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Juergen Freund / Diver watching a swimming Dugong (Dugong dugon). Dimakya Island, Palawan, Philippines, April 2010.

Jeff Rotman / Sandblasters searching and blowing a magnetic hit during the recovery of the shipwreck "Las Maravillas", a Spanish galleon sunk in 1658, Bahamas. 1987, Model released Model released.

Sergio Hanquet / Smalltooth sand tiger shark (Odontaspis ferox) swimming over sea floor, diver in background. El Hierro. Canary Islands.

Sergio Hanquet / Smalltooth sand tiger shark (Odontaspis ferox) swimming in reef, diver in distance. El Hierro. Canary Islands.

Gary Bell/ Oceanwide / Grey Nurse Shark (Carcharias taurus) and diver, Solitary Islands Marine Park, New South Wales, Australia

Pascal Kobeh / Diver in a school of sand smelts (Atherina presbyter), Canary Islands

Pascal Kobeh / Threadfin / Long-rayed sand diver (Trichonotus elegans) half burried in the sand, Sulu sea, Philippines

Richard Robinson / Bridled bream (Scolopsis bilineatus) Ono-i-Lau / Ono-i-Tonga, Lau Island Group, Fiji.

Alex Mustard / Coconut / Veined octopus (Amphioctopus marginatus) hunts in the sand at night, while illuminated by a diver's torch beam, Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Pacific Ocean.

Pascal Kobeh / Goldbar / Halstead's sand diver (Trichonotus halstead) Sulu Sea, Philippines

Alex Mustard / Diver with friendly Nassau grouper (Epinephelus striatus) over sand by a coral reef. San Salvador island, Bahamas. Bahamas Sea, Tropical West Atlantic Ocean.

Pascal Kobeh / Diver above Cowtail stingray (Hypolophus sephen) buried in the sand, Madagascar. Indian Ocean. September 2012.

Michael Pitts / Diver examining barrel containing English East India Company coins from the wreck of the Admiral Gardner, wrecked 1809 on the Goodwin Sand, England.

Alex Mustard / A male common cuttlefish (Sepia officinalis) displays to another cuttlefish buried in the sand, while a diver photographs them, Gran Canaria, Canary Islands, Spain, May 2008, Model released

Chris Newbert / Sand Diver (Trichonotus sp) in burrow, Indonesia

Alex Mustard / Southern stingray (Hypanus americanus) swimming over sand by the stern of the USS Kittiwake (US Military submarine rescue vessel) with diver in background. Photograph was taken shortly after the wreck...

Jeff Rotman / Diver discovers Roman Amphora on sea floor. Ustica Island, Italy, Mediterranean Sea Model released.

Juergen Freund / Threadfin sand diver (Trichonotus elegans) on seabed, West New Britain, Papua New Guinea.

Juergen Freund / Threadfin sand diver (Trichonotus elegans) swimming over seabed, Lembeh Strait, North Sulawesi, Indonesia.

Alex Mustard / Diver photographing an Angelshark (Squatina squatina) as it rests on the seabed. Gran Canaria, Canary Islands, Spain.

Michele Westmorland / Sand diver / Lizardfish (Snyodus intermedius) head portrait, Dominica, West Indies, Caribbean.

Jeff Rotman / Diver searching with a sandblaster and magnetic hit during the recovery of the shipwreck "Las Maravillas", a Spanish galleon sunk in 1658, Bahamas. 1987

Fred Bavendam / Spotted Weever (Parapercis hexophthalma) swimming over reef, Tonga

Nature Production / Diver beside Nomura's / Sand Jellyfish {Nemopilema nomurai} Shimane, Japan

Juergen Freund / Sand diver {Trichonotus sp} Indo pacific

Piotr Naskrecki / Sand-diver Spider (Ammoxenus sp) group chase worker Termites at very high speed, and then drag their prey to feed safely, Botswana

Willem Kolvoort / Diver observes colonies of Moss animals (Cristatella mucedo) positioned on top of Canadian waterweed in order to get the best chance to catch plankton, sand-winning pit, Holland

Norbert Wu / Swimmer and coral sand beaches with unique granite formations, Seychelles

Jeff Rotman / Diver inspects Sand tiger shark caught in anti-shark net {Carccharias taurus} Durban, South Africa Model released.

Nature Production / Diver with Nomura's / Sand Jellyfish {Nemopilema nomurai} swimming sideways, Oki, Shimane, Japan

David Fleetham / Spotted sand diver (Trichonotus setiger) swimming over sandy seabed, Philippines, Philippine Sea.

Pascal Kobeh / Diver watching a Giant guitarfish / Whitespotted wedgefish (Rhynchobatus djiddensis) partially buried in the sand with two remoras (Echeneis naucrates), Indian Ocean, Maldives. Model released.

Pascal Kobeh / Sand tiger / Grey nurse shark (Carcharias taurus) on the reef of Aliwal shoal with a diver in the background. Kwazulu-Natal, South Africa

Pascal Kobeh / Sand tiger / grey nurse sharks (Carcharias taurus) on the reef of Aliwal shoal with a diver in the background, Kwazulu-Natal, South Africa

Claudio Contreras / Sand diver lizardfish (Synodus intermedius), Cienaga de Zapata National Park, Matanzas Province, Cuba.

Franco Banfi / Scuba diver approaching a Spiny butterfly ray / Mantelina (Gymnura altavela), camouflaged under the sand, South Tenerife, Canary Islands, Atlantic Ocean.

David Fleetham / Spotted sand diver (Trichonotus setiger) Philippines.

Shane Gross / Scuba diver swimming along sand ripples in The Bahamas.