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Whitetip reef shark (Triaenodon obesus) is a requiem shark in the genus Carcharinidae, Queensland, Australia, Pacific

Potato cod (Epinephelus tukula) (potato grouper) (potato bass), Cod Hole, North Ribbon reef, Great Barrier Reef, Queensland, Australia, Pacific

Mating display by pair of Wire-net filefish (Cantherhines paradalis), Queensland, Australia, Pacific

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

Pink salmon (Oncorhynchus gorbuscha), spawning season, Prince William Sound, Alaska, United States of America, North America

Lion's mane jellyfish (Cyanea capillata), Prince William Sound, Alaska, United States of America, North America

Moon jellyfish bloom (Aurelia aurita), Prince William Sound, Alaska, United States of America, North America

Pink salmon (Oncorhynchus gorbuscha), spawning season, Port Valdez, Alaska, United States of America, North America

Lion's mane jellyfish ((Cyanea capillata), Prince William Sound, Alaska, United States of America, North America

California gray whale calf (Eschrichtius robustus) being touched underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

California gray whale calf (Eschritius robustus), half above half below, San Ignacio Lagoon, Baja California Sur, Mexico, North America

A pod of common bottlenose dolphins (Tursiops truncatus), underwater at El Mogote, Baja California Sur, Mexico, North America

California sea lion bulls (Zalophus californianus) underwater, Los Islotes, Baja California Sur, Mexico, North America

California sea lion (Zalophus californianus) underwater at Los Islotes, Baja California Sur, Mexico, North America

California sea lion (Zalophus californianus), half above and half under at Los Islotes, Baja California Sur, Mexico, North America

West Indian manatee (Trichechus manatus), half above and half below, Homosassa Springs, Florida, United States of America, North America

West Indian manatee (Trichechus manatus), half above and half below, Homosassa Springs, Florida, United States of America, North America

West Indian manatees (Trichechus manatus) underwater in Homosassa Springs, Florida, United States of America, North America

West Indian manatee (Trichechus manatus), half above and half below, Homosassa Springs, Florida, United States of America, North America

Blooming moon jellyfish (Aurelia aurita), Pond Island in Kelp Bay, Baranof Island, southeast Alaska, United States of America, North America

Giant trevally (Caranx ignobilis), at One Foot Island, Aitutaki, Cook Islands, South Pacific Islands, Pacific

Snorkeling the pristine reefs on the remote Island of Alofi in The French Territory of Wallis and Futuna Islands, South Pacific Islands, Pacific

Giant trevally (Caranx ignobilis), with photographer at One Foot Island, Aitutaki, Cook Islands, South Pacific Islands, Pacific

Giant trevally (Caranx ignobilis), at One Foot Island, Aitutaki, Cook Islands, South Pacific Islands, Pacific

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

Schooling mullets off a tiny motu in the inner lagoon of Bora Bora, Society Islands, French Polynesia, South Pacific, Pacific

Adult tawny nurse shark (Nebrius ferrugineus) being fed by hand in Rotoava, Fakarava, French Polynesia, South Pacific, Pacific

Giant stingray (Dasyatis spp) cruising with tourists in the shallow waters of Stingray City, Society Islands, French Polynesia, South Pacific, Pacific

Blacktip reef sharks (Carcharhinus melanopterus) cruising the shallow waters of Moorea, Society Islands, French Polynesia, South Pacific, Pacific

Blacktip reef sharks (Carcharhinus melanopterus) cruising near tourists at Stingray City, Moorea, Society Islands, French Polynesia, South Pacific, Pacific

Blacktip reef sharks (Carcharhinus melanopterus) cruising the shallow waters of Moorea, Society Islands, French Polynesia, South Pacific, Pacific

Blacktip reef shark (Carcharhinus melanopterus) cruising the shallow waters of Moorea, Society Islands, French Polynesia, South Pacific, Pacific

Blacktip reef sharks (Carcharhinus melanopterus) cruising the shallow waters of Moorea, Society Islands, French Polynesia, South Pacific, Pacific

Lion's mane jellyfish, Cyanea capillata, is the largest known species of jellyfish. Petersburg, Southeast Alaska, United States of America

Whale shark (Rhincodon typus) with rainbow runner observed by a tourist and guide in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Tourists snorkelling with a whale shark (Rhincodon typus) in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Tourists snorkelling with a whale shark (Rhincodon typu ) in Honda Bay, Puerto Princesa, Palawan, The Philippines, Southeast Asia, Asia

Whale shark (Rhincodon typus) below a banca boat in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Whale shark (Rhincodon typus) below a banca boat in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Tourist snorkelling with a whale shark (Rhincodon typus) in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Whale shark (Rhincodon typus) with a shoal of red fish evading predation, Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Whale shark (Rhincodon typus) beneath a banca tour boat in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Whale shark (Rhincodon typus) below a banca boat in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Tourist and tour guide swimming with a whale shark (Rhincodon typus) in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Tourist snorkelling with a whale shark (Rhincodon typus) in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Whale shark (Rhincodon typus) vertical suction feeding on a shoal of red fish, Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Whale shark (Rhincodon typus) swimming past a jellyfish (Thysanostoma loriferum), Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Snorkeller swimming with a juvenile whale shark (Rhincodon typus) in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Whale shark (Rhincodon typus) with boat propeller injury, Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Tourists snorkelling with a whale shark (Rhincodon typus) in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Snorkeller with oceanic manta ray (Manta birostris) feeding near the surface, Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Oceanic manta ray (Manta birostris) feeding near the surface, Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Spinetail devil rays (Mobula mobular) engaged in sexual courtship in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

A group of snorkellers observing spinetail devil rays (Mobula mobular) engaged in sexual courtship in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Spinetail devil rays (Mobula mobular) engaged in sexual courtship in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Spinetail devil rays (Mobula mobular) engaged in sexual courtship in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Snorkellers with an oceanic manta ray (Manta birostris) feeding near the surface, Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Oceanic manta ray (Manta birostris) feeding near the surface, Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Spinetail devil rays (Mobula mobular) engaged in sexual courtship in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

Small scale scorpionfish (Scorpaenopsis oxycephala) (Tassled scorpionfish) in the Red Sea, Marsa Alam, Egypt, North Africa, Africa

Humpback whale (Megaptera novaeangliae), underwater, Hawaii, United States of America, Pacific, North America

A black and yellow ornate ghost pipefish (Solenostomus paradoxus) pictured against coral, Russell Islands, Solomon Islands, South Pacific, Pacific

Bigfin reef squid (Sepioteuthis lessoniana), tending eggs which have been laid along a buoy line, taken at dusk, Lembeh Strait, Indonesia, Southeast Asia, Asia

A juvenile hairy frogfish (Antennarius striatus) of approximately 5mm long, Lembeh Strait, Indonesia, Southeast Asia, Asia

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

Close-up view of the underside of a Hawksbill sea turtle, complete with barnacles, on a reef in Raja Ampat, West Papua, Indonesia, Southeast Asia, Asia

A bright pink purple paddle-flap scorpionfish {Rhinopias eschmeyeri) on volcanic sand, Tulamben, Bali, Indonesia, Southeast Asia, Asia

Yellow painted frogfish (Antennarius pictus), side profile on volcanic sand, Tulamben, Bali, Indonesia, Southeast Asia, Asia

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

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

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

The shell of Hawaiian reef lobster (Enoplometopus occidentalis), covered in algae and parasitic barnacles, Hawaii, United States of America, Pacific, North America

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

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

Endangered Florida manatee (Trichechus manatus latirostris), at Three Sisters Spring in Crystal River, Florida, United States of America, North America

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

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

Florida manatees (Trichechus manatus latirostris), gather at Three Sisters Springs in Crystal River, Florida, United States of America, North America

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

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

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

Schooling goldspot emperor or bream (Gnathodentex aureolineatus), off the island of Yap, Micronesia, Pacific

A hard coral reef along with schooling anthias and reef fish, Crystal Bay, Bali island, Indonesia, Southeast Asia, Asia

Whitetip reef sharks (Triaenodon obesus) resting on the ocean floor, Hawaii, United States of America, Pacific, North America

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