1387-968 - A boat captain watches an oceanic whitetip shark below at Cat Island in the Bahamas.

1387-844 - Snorkeler exploring starfish in lagoon in Tioman Island, Malaysia.

1387-1162 - Portrait of an American saltwater crocodile on the surface of a mangrove at sunset with mouth wide open, Jardines De La Reina, Cuba.

1387-1147 - American saltwater crocodile (Crocodylus acutus) in mangrove with mouth open showing teeth, Jardines De La Reina, Cuba.

1387-1146 - A large whale shark under a bagan, siphoning water from the surface, with sunrays shining in the water, Cenderawasih Bay, West Papua, Indonesia.

1387-1088 - Whale Shark feeding off coast of Isla Mujeres, Mexico.

1387-1087 - Whale Shark feeding off coast of Isla Mujeres, Mexico.

1387-1069 - Whale Shark off coast of Isla Mujeres, Mexico.

1387-1065 - Snorkeler photographing Green Turtle in Caribbean Sea near Cancun Mexico.

1178-44643 - Whiteface Mountain and Lake Placid at sunset

1387-814 - American Alligator (Alligator mississippiensis) split over and under water shot, Florida Everglades, Florida.

1387-736 - Saltwater crocodile of Cuba.

1387-653 - Blacktip reef sharks patrol the shallow waters around a small island in Tahiti, French Polynesia.

1387-629 - The ocean is beautiful just under the surface near the desolate desert of Egypt.

1387-589 - A healthy coral reef thrives in Komodo National Park, Indonesia.

1387-588 - A healthy coral reef thrives in Komodo National Park, Indonesia.

1387-585 - A healthy coral reef thrives in Komodo National Park, Indonesia.

1387-586 - A healthy and beautiful coral reef thrives in shallow water in Raja Ampat, Indonesia.

1387-584 - A beautiful coral reef thrives in shallow water in Indonesia's Banda Sea.

1387-582 - A healthy and beautiful coral reef thrives in shallow water in Raja Ampat, Indonesia.

1387-576 - A beautiful coral reef thrives in shallow water in Indonesia's Banda Sea.

1387-575 - A beautiful coral reef thrives in shallow water in Indonesia's Banda Sea. This part of eastern Indonesia is home to part of the world's greatest marine biodiversity.

1387-542 - A beautiful coral reef thrives amid the tropical islands of Raja Ampat, Indonesia.

1387-502 - A healthy and colorful coral reef thrives among the scenic islands of Raja Ampat, Indonesia.

1387-499 - A beautiful coral reef thrives just off the island of Ambon, Indonesia.

1387-468 - Healthy corals thrive along the edge of a mangrove forest in a remote part of Raja Ampat, Indonesia.

1387-466 - Healthy corals grow on the edge of a mangrove forest in a remote part of Raja Ampat, Indonesia.

1387-465 - Discarded plastic bags and other trash float above a shallow coral reef in Raja Ampat, Indonesia. Plastics have become a major pollution problem worldwide.

1387-426 - A beautiful coral reef, dominated by colorful gorgonians, grows along the edge of the Blue Hole in Lighthouse Reef in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.

1387-425 - A beautiful coral reef, dominated by colorful gorgonians, grows along the edge of the Blue Hole in Lighthouse Reef in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.

1387-381 - A beautiful coral reef grows near an island in the Banda Sea, Indonesia. This remote and historic region, known previously for the Spice Islands, harbors extraordinary marine biodiversity.

1387-382 - A beautiful coral reef grows near an island in the Banda Sea, Indonesia. This remote and historic region, known previously for the Spice Islands, harbors extraordinary marine biodiversity.

1387-337 - A beautiful coral colony (Heliopora sp.) grows in Komodo National Park, Indonesia.

1387-330 - A beautiful set of corals grows in extremely shallow water in Komodo National Park, Indonesia.

1387-309 - Bright sunlight shines down on lily pads growing along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.

1387-307 - Colorful and flowering lily pads grow along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.

1387-306 - Colorful lily pads grow along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.

1387-293 - A banded sea snake (Laticauda colubrina) swims at the surface in Wakatobi National Park, Indonesia. This is one of the most venomous snakes in the world.

1387-292 - A shallow coral reef thrives in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

1387-280 - Colorful lily pads grow along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.

1387-278 - Lily pads grow along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.

1387-279 - Colorful lily pads grow along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.

1387-223 - Reef-building corals thrive in shallow water in Raja Ampat, Indonesia. This remote region is known for its beautiful reefs and spectacular marine biodiversity.

1387-216 - Colorful gorgonians and reef-building corals grow in shallow water near the famous Blue Hole in Belize. This part of Central America is well known for its clear waters and beautiful coral reefs.

1387-205 - A beautiful coral reef grows near a set of limestone islands in Raja Ampat, Indonesia. This remote, equatorial region is known as the heart of the Coral Triangle. It is a popular destination for scuba divers and snorkelers.

1387-192 - A slightly bleached staghorn coral colony grows in shallow water in the Solomon Islands. This Melanesian region is known for its spectacular marine biodiversity.

1387-28 - A Galapagos shark (Carcharhinus galapagensis), breaching the surface, Hawaii, United States of America, Pacific, North America

1116-53665 - Paraplegic man in a manual wheelchair at the bottom of steps with his service dog outdoors at a recreation area, both looking at the steps and the problem of inaccessibility, Boynton Beach, Florida, United States of America

1116-53661 - Hoodoos of Valley of Dreams take on fantastical shapes after eons of erosion from wind and rain, Albuquerque, New Mexico, United States of America

1116-53662 - Hoodoos and formations of Valley of Dreams in a remote area of New Mexico. The hoodoos are formed by erosive forces like wind and rain, Albuquerque, New Mexico, United States of America

1116-53660 - Hoodoos and formations in Valley of Dreams in a remote area of New Mexico at sunset. The hoodoos are formed by erosive forces like wind and rain, Albuquerque, New Mexico, United States of America

1116-53659 - Surreal landscape of White Pocket with stormy clouds gathering overtop. They are comprised of swirling, multicolured Navajo Limestone with domes, hoodoos and potholes, Arizona, United States of America

1116-53655 - Trail through the striated corridors of Mystic Canyon, an amazing place to walk through and explore. Eons of erosion have created amazing feats of nature, Kanab, Utah, United States of America

1116-53416 - Ruppell's vulture (Gyps rueppelli) turning head on termite mound in Serengeti National Park, Tanzania

1116-53370 - Close-up portrait of two lappet-faced vultures (Torgos tracheliotos) standing on grass, Serengeti National Park, Tanzania, Africa

1116-53319 - Close-up portrait of a male willow ptarmigan (Lagopus lagopus) showing early breeding colors in its neck and eye combs, surveying its high-country territory in Southcentral Alaska's Chugach Mountains on an April day. The head and neck will become completely chocolate-brown as the bird's breeding colors develop, Alaska, United States of America

1116-53316 - Close-up portrait of the profile of a red fox (Vulpes vulpes) pausing while hunting on a frosty October morning in South Central Alaska, Anchorage, Alaska, United States of America

1116-53315 - Portrait of a red fox (Vulpes vulpes) standing in the grass watching intently while hunting on a frosty October morning in Southcentral Alaska, Anchorage, Alaska, United States of America

1116-53314 - Close-up portrait of the profile of a red fox (Vulpes vulpes) looking up and testing the wind while hunting on a frosty, October morning in South Central Alaska, Anchorage, Alaska, United States of America

1116-53313 - A black-billed magpie (Pica hudsonia) picks the bones of a dead Dall sheep killed by wolves in Chugach State Park, Alaska, United States of America

1116-53305 - Polar bear (Ursus maritimes) lying down in the snow, Churchill, Manitoba, Canada

1116-53301 - Portrait of a sunlit, wolf (Canis lupus) standing in the brush in the snow, Churchill, Manitoba, Canada

1116-53299 - Portrait of a polar bear (Ursus maritimes) standing in the snow looking at the camera, Churchill, Manitoba, Canada

1116-53242 - Portrait of a pair of river otters (Lutra canadensis) pause near an ice-fishing hole on an Anchorage area lake. Members of the weasel family, otters catch and eat trout, suckers and other fish, Anchorage, Alaska, United States of America

1116-53243 - Portrait of a river otter (Lutra canadensis) lying down near an ice-fishing hole on an Anchorage area lake. Members of the weasel family, otters catch and eat trout, suckers and other fish, Anchorage, Alaska, United States of America

1116-53217 - Baby boy with Down syndrome sitting and looking at a picture book on grass in a city park during a warm fall afternoon, Leduc, Alberta, Canada

1116-53184 - View of the river and rock cliffs of The Narrows, Zion National Park, Utah, United States of America

1116-53165 - Split View of a teenage girl snorkeling in a bikini with a tour boat on the surface of the water above, Country of Aruba

1116-53164 - Teenager dives into the Caribbean surf, Country of Aruba

1116-53127 - Close-up portrait of a Bengal tiger (Panthera tigris tigris) standing in the forest looking up, Madhya Pradesh, India

1116-53125 - Portrait of a Bengal tiger (Panthera tigris tigris) walking through grass in forest towards camera, Madhya Pradesh, India

1116-53126 - Close-up of a Bengal tiger (Panthera tigris tigris) lying in the forest, widely yawning, Madhya Pradesh, India

1116-53123 - Close-up portrait of Bengal tiger (Panthera tigris tigris) lying down in the grass, watching the camera, Madhya Pradesh, India

1116-53122 - Portrait of Bengal tiger (Panthera tigris tigris) lying down in the grass staring ahead into the distance, Madhya Pradesh, India

1116-53121 - Portrait of Bengal tiger (Panthera tigris tigris) lying beside waterhole, watching camera, Madhya Pradesh, India

1116-53119 - Portrait of Bengal tiger (Panthera tigris tigris) lying on ground amongst roots in forest, looking at the camera, Madhya Pradesh, India

1116-53079 - Coyote (Canis latrans) walking across a wintry landscape near Val Marie, Saskatchewan, Canada

1116-53452 - Dall sheep ewe (Ovis dalli dalli) in thick winter pelage rests in this image taken in the bluffs along the Seward Highway and Turnagain Arm south of Anchorage, Alaska, USA, Alaska, United States of America

743-480 - White rhino (Ceratotherium simum), Kruger National Park, South Africa, Africa

743-449 - Nile crocodile (Crocodylus niloticus) with jaws open, Kruger National Park, South Africa, Africa

1382-113 - Reflections in Traku Street, Vilnius, Lithuania, Europe

860-292133 - Chacma baboon (Papio ursinus) drinking in waterhole surface level in Kruger National park, South Africa

1369-181 - A boat off Cuckmere Haven beach at sunset, East Sussex, England, United Kingdom, Europe

1116-52923 - Hiker stands on a moss-covered rock in the Atacama desert, Chile

1116-52918 - Cowboy's gold spur glistens in the sun, Nebraska, United States of America

1116-52886 - Harbor seal (Phoca vitulina) just above tideline lying down on a bed of yellow, orange seaweed in the sun, on a summer day in Prince William Sound, Alaska, United States of America

1116-52885 - Close-up portrait of an oystercatcher bird (Haematopus) standing on a rock covered in yellow, orange colored seaweed, on a summer day in Prince William Sound, Alaska, United States of America

1116-52883 - Portrait of a young, male lion (Panthera leo) standing on savanna, staring at the camera, licking his lips, Laikipia, Kenya

1116-52880 - Close-up of a Lioness (Panthera leo) walking through the low bushes in sunshine, Laikipia, Kenya

1116-52869 - Portrait of a Cape Buffalo (Syncerus caffer) drinking from river carrying two cattle egrets (Bubulcus ibis) on its back in Chobe National Park, Chobe, Botswana

1116-52868 - Portrait of a Cape Buffalo (Syncerus caffer) drinking from river carrying two cattle egrets (Bubulcus ibis) on its back in Chobe National Park, Chobe, Botswana

1116-52867 - Leopard tortoise (Stigmochelys pardalis) walks past over dry grass, Laikipia, Kenya

1116-52865 - Aldabra giant tortoise (Aldabrachelys gigantea) crosses lawn near trees, Segera, Laikipia, Kenya

1116-52855 - Close-up of African elephant (Loxodonta africana) feeding in river in Chobe National Park, Botswana

1116-52854 - Close-up of African elephant (Loxodonta africana) eating in river in Chobe National Park, Botswana

1178-44269 - USA, California, Catalina Island, Avalon, Nautical rope and buoys on sea coast

1112-8264 - Above and below photo in the crystal clear water in the shallow reefs off Wayag Bay, Raja Ampat, Indonesia, Southeast Asia, Asia

1112-8241 - Above and below view of Sauwaderek Village Reef, Raja Ampat, Indonesia, Southeast Asia, Asia

1112-8233 - Above and below view of islets covered in vegetation from inside the natural protected harbor, Wayag Bay, Raja Ampat, Indonesia, Southeast Asia, Asia

1360-381 - Central street, after rain in the old town, Bruneck, Sudtirol (South Tyrol) (Province of Bolzano), Italy, Europe