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A moon jellyfish catches the sunlight, Antigua, Leeward Islands, West Indies, Caribbean, Central America

Galapagos penguin (Spheniscus mendiculus) underwater at Isabela Island, Galapagos Islands, Ecuador, South America

Curious flightless cormorant (Phalacrocorax harrisi) underwater at Tagus Cove, Isabela Island, Galapagos Islands, Ecuador, South America

Curious flightless cormorant (Phalacrocorax harrisi) underwater at Tagus Cove, Isabela Island, Galapagos Islands, Ecuador, South America

Curious flightless cormorant (Phalacrocorax harrisi) underwater at Tagus Cove, Isabela Island, Galapagos Islands, Ecuador, South America

Galapagos fur seal (Arctocephalus galapagoensis) underwater at Isabela Island, Galapagos Islands, Ecuador, South America

Adult green sea turtle (Chelonia mydas) underwater near camera, Isabela Island, Galapagos Islands, Ecuador, South America

Adult green sea turtle (Chelonia mydas) feeding underwater near Isabela Island, Galapagos Islands, Ecuador, South America

Adult green sea turtle (Chelonia mydas) underwater near Rabida Island, Galapagos Islands, Ecuador, South America

Group of spotted eagle rays (Aetobatis narinari), Oahu, Hawaii, United States of America, Pacific, North America

The Caribbean reef squid (Sepioteuthis sepioidea), in the Caribbean Sea, Bonaire, St. Eustatius and Saba, Central America

Dense swarms of juvenile squat lobster (Munida gregaria) off Akaroa, South Island, New Zealand, Pacific

Dense swarms of juvenile squat lobster (Munida gregaria) off Akaroa, South Island, New Zealand, Pacific

Antarctic fur seal (Arctocephalus gazella) pup underwater in Stromness Bay, South Georgia, South Atlantic Ocean, Polar Regions

Underwater view of a school of silver fish swimming in a blue aquarium environment with simulated wreckage and filtered sunlight.

A pod of spinner dolphins (Stenella longirostris) in Hawaii, United States of America, Pacific, North America

A pair of Atlantic bottlenose dolphins (Tursiops truncatus), in the Bahama Banks, Bahamas, Central America

Atlantic bottlenose dolphin (Tursiops truncatus), Curacao, Netherlands Antilles, Caribbean, Central America

These striped catfish (Plotosus lineatus) have a venomous spine in front of their pectoral fin, Philippines, Southeast Asia, Asia

A bluestreak cleaner wrasse searching the mouth of a clown sweetlips for parasites, Yap, Micronesia, Pacific

A female green sea turtle (Chelonia mydas), and schooling bigeye jacks (Caranx sexfasciatus), Malaysia, Southeast Asia, Asia

Freckled hawkfish (Paracirrhites forsteri) a reef fish that feeds on small fish and shrimps, Matangi Island, Vanua Levu, Fiji, Pacific

Pink anenomefish (Amphoprion perideraion) dominant female, lives in symbiotic association with its host anemone, Matangi Island, Vanua Levu, Fiji, Pacific

Golden damselfish (Amblyglyphidodon aureus) a zoo plankton feeding coral reef fish seen here ingesting food, Matangi Island, Vanua Levu, Fiji, Pacific

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

The porcelain crab (Neopetrolisthes maculatus), commensal in sea anemones, Philippines, Southeast Asia, Asia

Hinge beak shrimp (Hinge beak prawn) (Rhynchocinetes sp.) emerges to feed at night, Matangi Island, Vanua Levu, Fiji, Pacific

Dusky anenomefish (Amphiprion melanomas) dominant female, lives in symbiotic association with its host anemone, Matangi Island, Vanua Levu, Fiji, Pacific

A nurse shark (Ginglymostoma cirratum) pictured with a school of juvenile jacks. Bahamas, Central America

Green sea turtle (Chelonia mydas) underwater with snorkeler, Maui, Hawaii, United States of America, Pacific

Green sea turtle (Chelonia mydas) underwater with snorkeler, Maui, Hawaii, United States of America, Pacific

Green sea turtle (Chelonia mydas) underwater with snorkeler, Maui, Hawaii, United States of America, Pacific

Green sea turtle (Chelonia mydas) underwater with snorkeler, Maui, Hawaii, United States of America, Pacific

A green sea turtle (Chelonia mydas) makes its way to the surface off Maui, Hawaii, United States of America, Pacific, North America

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

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

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

Common giant clam (Tridacna maxima) macro, Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Bluespine unicorn fish (Naso unicornis) close-up, Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

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

Bluespotted Stingray (taeniura lymma) close-up top view, Naama Bay, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Sohal surgeonfish (Acanthurus sohal) in shallow water, low angle view, Ras Mohammed National Park, Red Sea, Egypt, North Africa, Africa

Close-up of eyes of a bluespotted stingray (Taeniura lymma), Naama Bay, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

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

Three-spot damsel fish (Dascyllus trimaculatus), magnificent anemone (Heteractis magnifica) close-up, Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Emperor angelfish (Pomacanthus imperator) close to sandy seabed, Naama Bay, Sharm el-Sheikh, Red Sea, Egypt, North Africa, Africa

Red sea anemone fish (Amphiprion bicinctus) and magnificent anemone (Heteractis magnifica), Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Emperor angelfish (Pomacanthus imperator), Naama Bay, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Close-up of mouth of magnificent anemone (Heteractis magnifica), Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Three-spot damsel fish (Dascyllus trimaculatus), magnificent anemone (Heteractis magnifica) close-up, 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

Giant moray (Gymnothorax javanicus), close-up of head, Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

A blue-spotted sea urchin (Astropyga radiata), Hawaii, United States of America, Pacific, North America

A humpback whale calf (Megaptera novaeangliae) heading to the surface, Hawaii, United States of America, Pacific, North America

Colourful healthy hard and soft coral reef with long nosed butterflyfish (Forcipiger flavissimus), Matangi Island, Vanua Levu, Fiji, Pacific

Trumpetfish (Aulostomus chinensis) attempting to conceal itself in a school of milletseed butterflyfish, United States of America, North America

Flying gurnard (Dactylopterus volitans), one male and one female, Dominica, West Indies, Caribbean, Central America

A rare longnose walking batfish (Ogcocephalus corniger) that usually lives at depths to 300m, Dominica, West Indies, Caribbean, Central America

A rare longnose walking batfish (Ogcocephalus corniger) that usually lives at depths to 300m, Dominica, West Indies, Caribbean, Central America

A rare longnose walking batfish (Ogcocephalus corniger) that usually lives at depths to 300m, Dominica, West Indies, Caribbean, Central America

Giant sponge showing how it filters water with the use of dye, Dominica, West Indies, Caribbean, Central America