Lagoon with coral sand beach protected by outer coral reef, Mana Island in Mamanuca Group, Fiji

Jourdan's turban (turbo jourdani) large gastropod shell, reddish-brown, Rottnest Island reef, wild, day, marine protected area, free-diving off, cool temperate waters of Western Australia. MORE INFO: Marine plant common kelp, a dominant feature of the underwater landscape. Protected areas are covered in lush growth of diverse algae, also red algea are here.

tallfin batfish (platax teira), juvenile, wild, day, marine protected area, diving off Coral Bay, Ningaloo reef, Western Australia, Indian Ocean. MORE INFO: with 3 dark bars, very long dorsal, anal and pelvic fins, feed on plankton from water column.

bengal sergeant (abudefduf bengalensis) wild, day, marine protected area, diving off Coral Bay, Ningaloo reef, Western Australia, Indian Ocean. MORE INFO: has rounded, white-edged tail lobes.

Olive ridley turtle hatchling, Lepidochelys olivacea, Costa do Sauipe, Bahia, Brazil (South Atlantic)

Olive ridley turtle hatchling, Lepidochelys olivacea, Costa do Sauipe, Bahia, Brazil (South Atlantic)

Saddled butterflyfish, Chaetodon ephippium, Namu atoll, Marshall Islands (N. Pacific).

Split image of Smallspotted dart, Trachinotus baillonii, swimming along the sandy shore at dusk, Rongelap, Marshall Islands, Micronesia

Whitetip reef shark, Triaenodon obesus, Namu atoll, Marshall Islands (N. Pacific).

Red (Lace) coral, Distichopora violacea, feather stars, and juvenile gray reef shark, Carcharhinus amblyrhynchos, Ailuk atoll, Marshall Islands, Pacific

Fluted giant clam, Tridacna squamosa, siphon detail, Namu atoll, Marshall Islands (Pacific).

Pink anemone fish, Amphiprion periderion, on magnificent sea anemone, Heteractis magnifica, Dumaguete, Negros, Philippines.

Starry night octopus, Octopus luteus, foraging on coral reef at night, Malapascua, Cebu, Philippines, Visayan Sea.

French angelfish, Pomacanthus paru, Ilha rata, Fernando de Noronha national marine sanctuary, Pernambuco, Brazil (S. Atlantic)

Pink hydrocoral (lace coral), Stylaster sp., Namu atoll, Marshall Islands (N. Pacific).

Family of false clown anemone fish, Amphiprion ocellaris, seeking refuge in sea anemone, Masaplod, Dumaguete, Negros Island, Philippines.

Mushroom coral, Ctenactis sp., night, Dumaguete, Negros Island, Philippines.

False clown anemone fish, Amphiprion ocellaris, Dauin, Dumaguete, Negros Island, Philippines.

Family of false clown anemone fish, Amphiprion ocellaris, seeking refuge in sea anemone, Dumaguete, Negros Island, Philippines.

Bluefin trevally, Caranx melampygus, Ailuk atoll, Marshall Islands, Pacific

Anemone fish, Amphiprion sp., Dumaguete, Negros Island, Philippines.

Fan coral, Subergorgia sp., and diver silhouette against he sun, Namu atoll, Marshall Islands (N. Pacific).

Family of false clown anemone fish, Amphiprion ocellaris, seeking refuge in sea anemone, Masaplod, Dumaguete, Negros Island, Philippines.

Pair of false clown anemonefish, Amphiprion ocellaris, in anemone, Daiun, Negros, Philippines.

Live Black-Lipped Pearl Oyster (Pinctada margaritifera) living on Haloha Reef off Maui; Maui, Hawaii, United States of America

Schooling Threadfin butterflyfish (Chaetodon auriga) in Rarotonga Lagoon, Cook Islands

Cautious and curious at the same time, a diver gets a good look at a day octopus (Octopus cyanea), Rarotonga, Cook Islands

A photographer lines up with his smart phone in a housing on this Green sea turtle (Chelonia mydas) off the coast of Maui, Hawaii, United States of America

Green sea turtles (Chelonia mydas), an endangered species, gathering at a cleaning station off Maui, Maui, Hawaii, United States of America

Green sea turtle (Chelonia mydas), an endangered species, is resting under a fan of gorgonian coral along with two remora, Philippines

Divers on a WW II Corsair fighter plane off Southeast Oahu, Oahu, Hawaii, United States of America

A snorkeler observes a group of Green Sea Turtles (Chelonia mydas) from above, Hawaii, United States of America

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

Diver and schooling Yellowfin Goatfish (Mulloidichthys vanicolensis). This species turns red at night and when they are in caves during the day, Kauai, Hawaii, United States of America

Clark's anemonefish (Amphiprion clarkii) in Beaded Sea Anemone (Heteractis aurora), Philippines

This Green sea turtle (Chelonia mydas), an endangered species, is rubbing it's chin on it's shoulder, Hawaii, United States of America

As a diver shines her light, schooling Pennantfish (Heniochus diphreutes) swim over antler coral on the outside of Molokini Marine Reserve off the island of Maui, Maui, Hawaii, United States of America

A photographer lines up with his smart phone in a housing on this Green sea turtle (Chelonia mydas) off the coast of Maui, Hawaii, United States of America

One of the many beaches on Molokai's South shore that are protected by the largest barrier reef in the state, Molokai, Hawaii, United States of America