Juergen Freund / Container of toilets spilled in to the Red Sea

Sebastian Kennerknecht / Cassin's Auklet (Ptychoramphus aleuticus) researchers, Jennifer Aragon, Michael Johns, and Ilana Nimz, weighing chicks taken from artifical nesting burrows near research station, South Farallon Island...

Sebastian Kennerknecht / Cassin's Auklet (Ptychoramphus aleuticus) researcher, Ilana Nimz, weighing chick taken from artifical nesting burrow near research station, South Farallon Islands, Farallon Islands, Farallon National...

Marie Read / Burrowing Owl (Athene cunicularia) outside its artifical nest burrow (plastic pipe embedded in earth bank). Salton Sea National Wildlife Refuge, California, USA, October.

Andy Trowbridge / Fly fisherman (David Tasker) drifting an artifical fly pass a 'sighted' brown trout (Salmo trutta) on the Oreti River, Te Anau, Southland District, South Island, New Zealand. December, 2006. Model rel...

Kim Taylor / Red mason bee (Osmia rufa) female exiting tube in order to turn around and enter tail first to off-load pollen into cell in artifical bee nesting box, Surrey, UK

Kim Taylor / Red mason bee (Osmia rufa) female in flight carrying pollen and flower nectar to nest in artifical bee nesting box, Surrey, UK, April

Merryn Thomas / Sun loungers lined up on the artifical beach at Los Cristianos, near Playa de las Americas, Tenerife, Canary Islands, April 2011.

Ann & Steve Toon / Common / Eurasian crane chick (Grus grus) being fed with artifical feeder, Great Crane captive breeding and reintroduction project, Wildfowl and Wetlands Trust, Slimbridge, Gloucestershire, UK, May 20...

Kerstin Hinze / Insect hotel / Artificial nest holes and shelter for insects and invertebrates, Nordrhein-Westfalen, Germany

Jeff Rotman / Shipwrecked tanker on coral reef off Ras Muhammed, Red Sea, Egypt

Michael Pitts / Anemones growing inside ship's bridge on wreck of tugboat ''Blue Plunder'', Nassau, Bahamas. July 2008.

Juergen Freund / The sunken wreck of HMAS Perth has formed an artifical reef off the coast of Albany, Western Australia

Juergen Freund / The sunken wreck of HMAS Perth has formed an artifical reef off the coast of Albany, Western Australia. Photographic display panel

Juergen Freund / Person diving the artifical reef which has developed on the sunken HMAS Perth. Albany, Western Australia

Michael Pitts / Looking down on the ventilators in the engine room of the shipwreck of the japanese WWII boat, 'Nippo Maru', Chuuk / Truk lagoon, Chuuk islands, Pacific ocean

Michael Pitts / Japanese Field Gun on the deck of the shipwrecked 'Nippo Maru', Truk / Chuuk Lagoon, Chuuk Islands, Pacific ocean

Michael Pitts / Bow gun on the wreck of the 'San Francisco Maru', Chuuk / Truk lagoon, Chuuk islands, Pacific ocean islands

Michael Pitts / Stern Gun on the shipwreck of the Japanese WWII boat, 'Shotan Maru', Chuuk Lagoon, Chuuk islands, Pacific ocean

Michael Pitts / Old Glory Goby fish{Amblygobius sp} on wreck of Japanese WWII boat, Chuuk / Truk lagoon, pacific ocean

Michael Pitts / Engine room ventilators on the shipwreck of the Japanese WWII boat, 'Seiko Maru', Chuuk / Truk lagoon, Chuuk islands, Pacific ocean

Michael Pitts / Japanese Tank on the wreck of the deck of the 'San Francisco Maru', Chuuk / Truk lagoon, Chuuk islands, pacific ocean islands

Sebastian Kennerknecht / Cassin's Auklet (Ptychoramphus aleuticus) artifical nesting burrows on hillside with Western Gulls (Larus occidentalis), South Farallon Islands, Farallon Islands, Farallon National Wildlife Refuge, Ca...

Sebastian Kennerknecht / Cassin's Auklet (Ptychoramphus aleuticus) researcher, Russell Bradley, holding chick near artifical nesting burrow, South Farallon Islands, Farallon Islands, Farallon National Wildlife Refuge, Califor...

Roberto Rinaldi / Ka Hing wreck, Kudat Peninsula, Sabah, Borneo.

Roberto Rinaldi / Wreck, now an artificial reef, with sponges, oysters and sea fans. Kudat, Borneo.

Roberto Rinaldi / Honeycomb / Zigzag oyster (Hyotissa hyotis) on Ka-Hing wreck, north Sabah, Borneo, Malaysia.

Roberto Rinaldi / Bi tube sponges (Haplosclerida sp) in front of the crane on the Ka Hing wreck, Kudat Peninsula, Sabah, Borneo Model released.

Roberto Rinaldi / Diver on Bowfield wreck, formerly called "Relitto del Faro" (the lighthouse wreck), Messina, Italy. Model released.

Roberto Rinaldi / Chinese wooden fishing vessel wreck with different types of sponges and molluscs, Lankayan, Borneo.