Colourful Crinoids and Solt Corals at Hanging Gardens, Sipadan Island, Sabah, Malaysia

Featherstars perch on the edge of Gorgonian Sea Fans to feed in the current, Fiji, Pacific Ocean

Resort huts beside coral sand beach, lagoon has outer coral reef, Mana Island, Mamanuca Group, west of Viti Levu, Fiji, South Pacific islands, Pacific

Coral reef and diver, off Sharm el Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Lyretail anthias (Pseudanthias squamipinnis), school over mountain coral, reef, Ras Mohammed National Park, Sharm El Sheikh, Red Sea, Egypt, North Africa, Africa

Underwater view of a coral encrusted lobster pot on sandy ocean floor, Ras Mohammed National Park, Red Sea, Egypt, North Africa, Africa

Scuba diver and instructor performing skills next to coral, Sharm El Sheikh, Red Sea, Egypt, North Africa, Africa

Tropical coral reef scene with a leafy cup coral (salad coral) (Turbinaria reniformi), Ras Mohammed National Park, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

Island hopping by catamaran around coral fringe in clear waters, Bacuit Bay, El Nido Town, Palawan, Philippines, Southeast Asia, Asia

Typical healthy Red Sea hard coral reef landscape, Marsa Alam, Egypt, North Africa, Africa

Typical healthy Red Sea hard coral reef landscape, Marsa Alam, Egypt, North Africa, Africa

Tropical lagoon and coral reef, Baa Atoll, Maldives, Indian Ocean, Asia

Leaf fish (Taenianotus Triacanthus), an ambush predator found amonst corals, Celebes Sea, Sabah, Malaysia, Southeast Asia, Asia

Aerial view of atolls and coral reefs in the Maldives, Indian Ocean

Turquoise water and the Beachcomber Le Paradis five star hotel, with Mont Brabant in the background, Mauritius, Indian Ocean, Africa

Aerial view of island, Maldives, Indian Ocean, Asia

Aerial view of an sandbank and lagoon, Maldives, Indian Ocean, Asia

A hawksbill sea turtle (Eretmochelys imbricata), in a colorful overhang on a reef in the Koro Sea, Fiji, South Pacific, Pacific

The critically endangered hawksbill turtle (Eretmochelys imbricata) above coral reef, Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Tropical coral reef scene with a large table coral (Acropora pharaonis), Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Leopard shark, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Spotted eel at the Aquarium, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Free spotted eel, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Leopard shark, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Allied cowry (Phenacovolva gracilis), Southern Thailand, Andaman Sea, Indian Ocean, Asia

Close-up of giant sea fan coral (Gorgonian fan coral) (Annella mollis), Ras Mohammed National Park, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

Close-up of brain coral (Platygyra Daedalea), Ras Mohammed National Park, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

Magnificent anemone (Heteractis magnifica), Ras Mohammed National Park, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

School of sergeant major fish (Abudefduf vaigiensis) over pristine coral reef, Jackson Reef, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

Fish eye view with honeycomb stingray (Himantura uarnak), Shallow bay, Ras Mohammed National Park, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

Tropical coral reef scene in natural lighting, Ras Mohammed National Park, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

View over Coral Beach and Loch Dunvegan, Claigan, near Dunvegan, Isle of Skye, Inner Hebrides, Highland, Scotland, United Kingdom, Europe

An aerial view of the Great Barrier Reef, UNESCO World Heritage Site, Queensland, Australia, Pacific

Mast Head Island, Great Barrier Reef, UNESCO World Heritage Site, Queensland, Australia, Pacific

Aerial photography of coral reef formations of the Great Barrier Reef, UNESCO World Heritage Site, near Cairns, North Queensland, Australia, Pacific

Colourful, coral covered Reef wall at Osprey Reef, Longfin banner fish (Heniochus acuminatus), Coral Sea, Queensland, Australia, Pacific

Scuba Diver over Coral Reef, Osprey Reef, Coral Sea, Australia

Yellow Tube Sponges in Coral Reef, Aplysina fistularis, Caribbean Sea, Dominica

Shoal of Banana Fusiliers over Reef, Pterocaesio pisiang, Indian Ocean, Maldives

Shoal of Chromis over Reef, Chromis sp., Indian Ocean, Maldives

View over South Coast and coral reef, Antigua, Leeward Islands, West Indies, Caribbean, Central America

Green sea turtle getting its shell cleaned by goldring surgeonfish off Maui, Hawaii, United States of America, Pacific, North America

Several green sea turtles (Chelonia mydas) gather at a cleaning station off West Maui, Hawaii, United States of America, Pacific, North America

Coastal promenade walkway on east coast of Isla Mujeres, Caribbean Coast, Cancun, Quintana Roo, Mexico, North America

Reef of Table Corals, Acropora sp., Felidhu Atoll, Maldives

Nudibranch on coral, Papua New Guinea, Pacific

Colorful soft corals (Dendronephthya sp.) adorn the stunning reefs of southern Raja Ampat, West Papua, Indonesia, Southeast Asia, Asia

Close-up view of a Hawksbill sea turtle next to a red sea fan on a reef in Raja Ampat, West Papua, Indonesia, Southeast Asia, Asia

Raccoon butterflyfish (Chaetodon lunula) and saddle wrasse (Thalassoma duperrey), off the island of Lanai, Hawaii, United States of America, Pacific, North America

Alcyonaria coral with schooling anthias dominate this Fijian reef scene, Fiji, South Pacific, Pacific

Adult whitetip reef shark (Triaenodon obesus) with cleaner wrasse, Roroia, Tuamotus, French Polynesia, South Pacific, Pacific

Christmas-Tree Worm, Spirobranchus giganteus, Osprey Reef, Coral Sea, Australia

Shoal of Pygmy Sweeper, Parapriacanthus ransonneti, Triton Bay, West Papua, Indonesia

The popcorn shrimp (Periclimenes kororensis) in fungid coral (Heliofungia actiniformis) (mushroom coral), Celebes Sea, Sabah, Malaysia, Southeast Asia, Asia

Aerial view of lagoon, Maldives, Indian Ocean, Asia

Green sea turtles (Chelonia mydas), an endangered species, Hawaii, United States of America, Pacific, North America

Red Sea coral grouper (Plectropomus pessuliferus) close-up, Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Coral hind (cephalopholis), Southern Thailand, Andaman Sea, Indian Ocean, Southeast Asia, Asia

Fire coral and hard coral reef, Ras Mohammed National Park, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

Hard coral and tropical reef scene, Ras Mohammed National Park, off Sharm el Sheikh, Sinai, Egypt, Red Sea, North Africa, Africa

Medium shoal or school of blue striped snapper (Lutjanus kasmira) close to coral reef, Naama Bay, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

Half underwater split view of Coral Beach on Pigeon Island National Park, Trincomalee, Sri Lanka, Asia

View over shore at low tide to distant Coral Beach, Claigan, near Dunvegan, Isle of Skye, Inner Hebrides, Highland, Scotland, United Kingdom, Europe

Table Corals growing at Reef, Acropora sp., Felidhu Atoll, Maldives

Lyretail Anthias in Coral Reef, Pseudanthias squamipinnis, Felidhu Atoll, Maldives

Galapagos penguins, Galapagos Islands, Ecuador, South America

Pink Dendronephthya, soft coral, and anemonefish, Southern Thailand, Andaman Sea, Indian Ocean, Asia

Scuba Diver over Coral Reef, Osprey Reef, Coral Sea, Australia

Reef of Table Corals, Acropora sp., Felidhu Atoll, Maldives

Underwater diver swimming above reef, with orange sea fan, Similan Island, Thailand, Asia

Giant sea fan (Gorgonian fan coral) (Annella mollis), Ras Mohammed National Park, Red Sea, Egypt, North Africa, Africa

Reef Stonefish, Synanceia verrucosa, Osprey Reef, Coral Sea, Australia

Aerial photography of coral reef formations of the Great Barrier Reef, UNESCO World Heritage Site, near Cairns, North Queensland, Australia, Pacific

Fishing Net in Coral Reef, Red Sea, Egypt

Clown Anemonefish, Amphiprion percula, Osprey Reef, Coral Sea, Australia

Scuba Diver over Coral Reef, Osprey Reef, Coral Sea, Australia

Leopard Coral Grouper, Plectropomus leopardus, Great Barrier Reef, Australia

Clown Anemonefish, Amphiprion percula, Osprey Reef, Coral Sea, Australia

Coral substrate forming an underwater cave, Ras Mohammed National Park, Sharm El Sheikh, Red Sea, Egypt, North Africa, Africa

Coral reef scene, Ras Mohammed National Park, Sharm el-Sheikh, Red Sea, Egypt, North Africa, Africa

The lagoon with the world's most southerly coral reef, at this 10km long volcanic island in the Tasman Sea, Lord Howe Island, UNESCO World Heritage Site, New South Wales, Australia, Pacific

Reef scene with sea fan, Komodo, Indonesia, Southeast Asia, Asia

Rising to 260 feet above sea level, Makatea is a raised coral atoll with fresh water, Tuamotus, French Polynesia, South Pacific, Pacific

Pygmy Sweepers surrounding Coral Reef, Parapriacanthus ransonneti, Raja Ampat, West Papua, Indonesia

Reef Stonefish, Synanceia verrucosa, Osprey Reef, Coral Sea, Australia

Whitleys Slender Basslet between Mushroom Leather Corals, Luzonichthys whitleyi, Great Barrier Reef, Australia

Macro shot of stem and branches of pink soft broccoli coral (Dendronephthya hemprichi), Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Spotted eel, Dimaniyat Islands, Gulf of Oman, Oman, Middle East

Tropical coral reef scene with a leafy cup coral (salad coral) (Turbinaria reniformi), Ras Mohammed National Park, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

Colored Coral Reef, Komodo National Park, Indonesia

Corals growing near Mangroves, Raja Ampat, West Papua, Indonesia

Starfish in Coral Reef, Phataria unifascialis, Cabo Pulmo, Baja California Sur, Mexico

Ghost Goby in Soft Coral, Pleurosicya sp., Triton Bay, West Papua, Indonesia

Reef of Table Corals, Acropora sp., Felidhu Atoll, Maldives

Reef Stonefish, Synanceia verrucosa, Osprey Reef, Coral Sea, Australia

Aerial view of people on jet skis, Coral Bay, Paphos, Cyprus, Mediterranean, Europe

Blackmouth sea cucumber (Pearsonothuria graeffei) on coral reef, Ras Mohammed National Park, Sharm Eel-Sheikh, Red Sea, Egypt, North Africa, Africa

Lyretail anthias (Pseudanthias squamipinnis) side view of two females, Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Underwater image of the inner lagoon of Apataki coral atoll, Palliser Islands, Tuamotus, French Polynesia, South Pacific, Pacific

Colored Coral Reef, Komodo National Park, Indonesia