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A giant oceanic manta ray (Mobula birostris) with attached remoras at San Benedicto island in Mexico.

A diver has a close encounter with an oceanic whitetip shark (Carcharhinus longimanus) at Cat Island in the Bahamas.

A fantastic eruption of Aurora Borealis over Toviktinden Mountain in Troms County, Norway. Auroras are the result of the emissions of photons in the Earth's upper atmosphere.

Aurora Borealis and a shooting star in the woods of Troms County, Norway. Auroras are the result of the emissions of photons in the Earth's upper atmosphere.

Aurora Borealis over Vagsfjorden in Troms County, Norway. Auroras are the result of the emissions of photons in the Earth's upper atmosphere.

A magnificent display of aurora borealis shooting up from Toviktinden Mountain in Troms County, Norway. Auroras are the result of the emissions of photons in the Earth's upper atmosphere.

Aurora Borealis over Skittendalen Valley and the Skittendalen River in Troms County, Norway. Auroras are the result of the emissions of photons in the Earth's upper atmosphere.

Aurora Borealis over Skittendalen Valley and the Skittendalen River in Troms County, Norway. Auroras are the result of the emissions of photons in the Earth's upper atmosphere.

Aurora Borealis over Forramarka Woods in Tennevik, Troms County, Norway. Auroras are the result of the emissions of photons in the Earth's upper atmosphere.

Aerial drone panoramic view of Fort of Nossa Senhora da Rocha (Fort of Our Lady of the Rock) (Castle of Porches), Porches, Lagoa, Algarve, Portugal

Aerial drone panoramic view of Fort of Nossa Senhora da Rocha (Fort of Our Lady of the Rock) (Castle of Porches), Porches, Lagoa, Algarve, Portugal

Aerial drone panoramic view of Fort of Nossa Senhora da Rocha (Fort of Our Lady of the Rock) (Castle of Porches), Porches, Lagoa, Algarve, Portugal

Aerial drone panoramic view of Fort of Nossa Senhora da Rocha (Fort of Our Lady of the Rock) (Castle of Porches), Porches, Lagoa, Algarve, Portugal

Petrified sand dunes, White Canyon State Park, Red Cliffs Desert Reserve near St. George, Utah, United States of America

Petrified sand dunes, White Canyon State Park, Red Cliffs Desert Reserve near St. George, Utah, United States of America

A winter view looking out in Tjeldsundet strait towards the Saetertinden mountain in Troms County, Norway.

A Sheepshead looks on as a pair of Blue Angelfish appear to be confused on which direction to go but each are feeding on different parts of coral and algae covered jetty rocks at St. Andrew Bay channel wall in Panama City Beach, Florida.

A scuba diver swims through an underwater field of tape grass leading away from the Blue Springs cave in Merritts Mill Pond in Marianna, Florida.

A technical cave diver using a diver propulsion vehicle (DPV) to dive into the Blue Springs state park cave system near Marianna, Florida.

St. George Beach, St. George Island, near Kastellorizo (Megisti) Island, Dodecanese Group, Greek Islands, Greece, Europe

Golden Damselfish (Amblyglyphidodon aureus) and other schooling fish swim around the coral head topped with Elkhorn Coral in the South Pacific ocean near Tavarua Island offshore from Liti Levu, Fiji.

A Crown Jellyfish (Netrostoma setouchina) gently floating through South Pacific ocean waters off the coast of Tavarua Island, Fiji.

A Crown Jellyfish (Netrostoma setouchina) gently floating through South Pacific ocean waters off the coast of Tavarua Island, Fiji.

A Blue Spotted Lagoon Fantail Ray (Taeniura lymma) peeking out from under a coral reef ledge, Papua New Guinea.

A Map Turtle (Graptemys geographica) surfaces for air in the clear blue waters of Morrison Springs, a state park in Northwest Florida. The calm glassy water reflects the bright colors of the turtle with it's head above the surface but it's body inches below the surface.

A French Angelfish (Pomacanthus paru) swims up close to a Blue Striped Grunt (Haemulon sciurus) under a coral reef ledge in the Atlantic Ocean off the coast of Key Largo, Florida.

A Blue Parrotfish (Scarus coeruleus) swimming up after munching on the coral reef below in the Atlantic Ocean off the coast of Key Largo, Florida.

A Blue Chromis (Chromis cyanea) swims into the current to maintain station over a colorful reef in the Atlantic Ocean off the coast of Key Largo, Florida.

Elevated view natural volcanic rock pools near Aquarium of Madeira (Aquario da Madeira) and Cachalote restaurant, Porto Moniz, Madeira, Portugal, Atlantic, Europe

Rhine Falls near Schaffhausen with Schloss Laufen, Neuhausen bei Schaffhausen, Schaffhausen Canton, Switzerland, Europe

Three giant oceanic manta rays (Mobula birostris) circling at a cleaning station, South Ari Atoll, Maldives.

Boat landing stage on the Schluchsee reservoir, Schwarzwald (Black Forest), Baden-Wurttemberg, Germany, Europe

February 24, 2013 - Powerful explosive eruption of Sakurajima volcano, Japan. Ash cloud rises against blue sky.

A Red Sail Junk in Hong Kong Harbour, Hong Kong, Special Administrative Region of the People's Republic of China, China, Asia

November 28, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible against blue night sky.

January 24, 2012 - Lava in crater glowing during blue hour on Nyamuragira Volcano, Kimanura Eruption.

Large school of dozens of scalloped hammerhead shark converging towards the surface, silhouetted against the blue water, Cocos Island.

Caribbean reef shark swallowing a lionfish, with mouth open and eyelids closed, Jardines De La Reina, Cuba.

Blue and white striped Periclimenes shrimp over a mottled green and red anemone, Jardines De La Reina, Cuba.