1116-41494 - Slate pencil sea urchins (Heterocentrotus mammillatus) colour the hard coral in this Hawaiian reef scene with three free divers, Molokini Marine Preserve off the island of Maui, Maui, Hawaii, United States of America
1116-41500 - Two men free diving over a Hawaiian hard coral reef with slate pencil sea urchins (Heterocentrotus mammillatus), Hawaii, United States of America
1116-41503 - 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
857-95355 - Incredible views from the hard to reach beach at Halape along the Puna Coast Trail in Hawaii Volcanoes National Park on the Big Island. This beach is a turtle nesting sanctuary protected federally by the United States.
857-95358 - Incredible views from the hard to reach beach at Halape along the Puna Coast Trail in Hawaii Volcanoes National Park on the Big Island. This beach is a turtle nesting sanctuary protected federally by the United States.
857-95357 - Incredible views from the hard to reach beach at Halape along the Puna Coast Trail in Hawaii Volcanoes National Park on the Big Island. This beach is a turtle nesting sanctuary protected federally by the United States.
857-95356 - Incredible views from the hard to reach beach at Halape along the Puna Coast Trail in Hawaii Volcanoes National Park on the Big Island. This beach is a turtle nesting sanctuary protected federally by the United States.
1116-39732 - This species of coral hermit crab (Paguritta sp) is well known, but still awaiting a name from biologists. It lives in a hole in hard coral and traps passing plankton in it's feathery antennae, Yap, Micronesia
1116-39725 - Mouth detail of a colourful and healthy Mushroom coral, Fungia fungites, that is growing on a tropical coral reef in the Philippines. Mushroom coral is unique in the coral world, in that it does not attach itself to the bottom, Philippines
1116-39710 - Typical of this family, the Blackside Hawkfish (Paracirrhites forsteri) has thick spines in it's pectoral fins to aid staying in place on it's coral perch, Hawaii, United States of America
1116-39953 - This hard coral colony in the Pacific has begun to bleach, expelling its symbiotic zooxanthellae, consequences of global climate change and climate warming, Yap, Micronesia
1116-39938 - Mouth detail of a colorful and healthy mushroom coral (Fungia fungites) that is growing on a tropical coral reef. Mushroom coral is unique in the coral world, in that it does not attach itself to the bottom, Philippines
746-88425 - Greyleg Goose (Anser anser) during winter, snowfall and in deep snow, Germany. The Greylag Goose is originally a migratory bird, but some local populations tend to be resident for still unknown reasons, Europe, Central Europe, Bavaria, Germany
1112-3229 - Profusion of hard and soft corals as well as reef fish underwater at Batu Bolong, Komodo National Park, Flores Sea, Indonesia, Southeast Asia, Asia
1112-3231 - Profusion of hard and soft corals and reef fish underwater on Mengiatan Island, Komodo National Park, Flores Sea, Indonesia, Southeast Asia, Asia
1112-3227 - Profusion of hard and soft corals as well as reef fish underwater at Batu Bolong, Komodo National Park, Flores Sea, Indonesia, Southeast Asia, Asia
465-3387 - Colourful healthy hard and soft coral reef with long nosed butterflyfish (Forcipiger flavissimus), Matangi Island, Vanua Levu, Fiji, Pacific
465-3392 - Longnose hawkfish (Oxycirrhites typus) on gorgonian sea fans (Subergorgia mollis) a hard coral species found in high current areas, Matangi Island, Vanua Levu, Fiji, Pacific
1179-322 - Geological Devil's Bridge, a natural arch carved by the sea from soft and hard limestone ledges of the Antigua formation, Antigua, Leeward Islands, West Indies, Caribbean, Central America
1179-324 - Devil's Bridge, a natural arch carved by the sea from soft and hard limestone ledges of the Antigua formation, St. Johns, Antigua, Leeward Islands, West Indies, Caribbean, Central America
1179-258 - The collection of tea is really hard as in addition to having an excellent sight it is necessary to disentangle the dense twigs, Bagdogra, Darjeeling, India, Asia