Nurse Shark at Night, Nebrius ferrugineus, Felidhu Atoll, Maldives

Group of Nurse Shark at Night, Nebrius ferrugineus, Felidhu Atoll, Maldives

Blacktip Reef Shark, Carcharhinus melanopterus, Felidhu Atoll, Maldives

Nurse Shark at Night, Nebrius ferrugineus, Felidhu Atoll, Maldives

Nurse Shark at Night, Nebrius ferrugineus, Felidhu Atoll, Maldives

Group of Nurse Shark at Night, Nebrius ferrugineus, Felidhu Atoll, Maldives

Pink Whipray at Night, Pateobatis fai, Felidhu Atoll, Maldives

Nurse Shark at Night, Nebrius ferrugineus, Felidhu Atoll, Maldives

Group of Nurse Shark at Night, Nebrius ferrugineus, Felidhu Atoll, Maldives

Nurse Shark at Night, Nebrius ferrugineus, Felidhu Atoll, Maldives

Adult yellow-lipped sea krait (Laticauda colubrina) snake, at night on the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

Common lionfish (Pterois volitans) at night near the dock of the Komodo Island Diving Resort, Sebayur Island, Komodo Island National Park, Indonesia, Southeast Asia, Asia

Common lionfish (Pterois volitans) at night near the dock of the Komodo Island Diving Resort, Sebayur Island, Komodo Island National Park, Indonesia, Southeast Asia, Asia

Mako Shark (Isurus oxyrinchus) feeding on Grouper. Night diving encounter. North Island, Three Kings, New Zealand. (rr)

Humpback whale (Megaptera novaeangliae) fluking up for a deep dive with the midnight sun setting behind. Near Husavik on the north coast of Iceland

Humpback whale (Megaptera novaeangliae) fluking up for a deep dive in the midnight sun, near Husavik on the north coast of Iceland

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

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.

Needle cuttlefish, Sepia aculeata, front view at night, Dumaguete, Negros Island, Philippines.

Emperor shrimp, Periclimenes imperator, next to gills of spanish dancer, Hexabranchus sanguineus, night, Puerto Galera, Mindoro, Philippines.

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.

Balloonfish, Diodon holocanthus, at night, Dumaguete, Negros Island, Philippines.

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

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

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

Thorny oyster, Spondylus varius, resting on coral reef at night, Dumaguete, Negros Island, Philippines.

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

Close up of Mediterranean moray (Muraena helena) hunting at night, Italy

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

Shortnose boxfish, Rhynchostracion nasus, at night, Dumaguete, Negros Island, Philippines.

Emperor shrimp, Periclimenes imperator, on top of nudibranch, Pleurobranchus grandis, at night, Dumaguete, Negros Island, Philippines.

Pleurobranch slug, Pleurobranchus grandis, night, Dumaguete, Negros, Philippines.

Caiman or jacare, Caiman crocodilus yacare, at night, southern Pantanal, Mato Grosso do Sul, Brazil

Colorful decorator crab, Camposcia retusa, at night, Dumaguete, Negros Island, Philippines.

A stargazer fish (Uranoscopus scaber) during a night dive, Italy

Fire urchin, Asthenosoma varium, Sinandigan wall, Puerto Galera, Mindoro, Philippines.

The graphic and essential shape of a Parapandal shrimp (Plesionika narval) in an unusual shot from above which also highlights the eggs, with their characteristic blue color.

Freediver swimming with underwater scooter, Red Sea, Egypt, Africa

CHINA/Beijing/National Aquatic Center/17June2008:A soldier stands guard outside the National Aquatic Center at night. Designed by Australia's PTW Architects, its facade appearing as a cube of soap bubbles, it seats 17,000 people. The exterior is made from a high-tech lightweight translucent plastic that is also very energy efficient in saving an estimated 30% in power consumption by comparison to a traditional design. It houses 5 pools - one able to create it's own waves. It's outer surface looks like soap bubbles. It will host all swimming and diving events at the 2008 Olympics.

Jellyfish (Pelagia Noctiluca) With Fish Prey Photographed During A Blackwater Scuba Dive Several Miles Offshore Of A Hawaiian Island At Night, Hawaii, United States Of America

A Coastal Manta Ray (Manta Alfredi) Swiming Though A Scuba Diver's Bubbles That Was Photographed While Scuba Diving The Kona Coast At Night, Kona, Island Of Hawaii, 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

harbour in the night, Mo?cenicka Draga, Croatia, Istria, Mediterranean Sea

Red-legged Swimming Crab, Portunus convexus, Djibouti, Djibuti, Africa, Afar Triangle, Gulf of Aden, Gulf of Tadjourah

Red-legged Swimming Crab eating fish, Portunus convexus, Djibouti, Djibuti, Africa, Afar Triangle, Gulf of Aden, Gulf of Tadjourah

Night live, Freeport, Bahamas, Caribbean, Sea, Grand Bahama Island

Red-legged Swimming Crab eating fish, Portunus convexus, Djibouti, Djibuti, Africa, Afar Triangle, Gulf of Aden, Gulf of Tadjourah

harbour in the night, Mo?cenicka Draga, Croatia, Istria, Mediterranean Sea

Red-legged Swimming Crab, Portunus convexus, Djibouti, Djibuti, Africa, Afar Triangle, Gulf of Aden, Gulf of Tadjourah

Red-legged Swimming Crab, Portunus convexus, Djibouti, Djibuti, Africa, Afar Triangle, Gulf of Aden, Gulf of Tadjourah

Night live, Freeport, Bahamas, Caribbean, Sea, Grand Bahama Island

harbour in the night, Mo?cenicka Draga, Croatia, Istria, Mediterranean Sea

harbour in the night, Mo?cenicka Draga, Croatia, Istria, Mediterranean Sea

Red-legged Swimming Crab eating fish, Portunus convexus, Djibouti, Djibuti, Africa, Afar Triangle, Gulf of Aden, Gulf of Tadjourah

harbour in the night, Mo?cenicka Draga, Croatia, Istria, Mediterranean Sea