Photograph by Brian Skerry, National Geographic
A school of fish swims past the underwater research laboratory Aquarius, located 62 feet (19 meters) beneath the Florida Keys National Marine Sanctuary.
Photograph by Paul Nicklen, National Geographic
A diver swims over a bed of large, round table coral. This photo was taken near Kanton Island, part of the Phoenix Islands in Kiribati, a country in the Pacific Ocean. This area is famous for its beautiful coral.
Sea Otter, Monterey Bay
Photograph by Bill Curtsinger, National Geographic
A young sea otter frolics in Monterey Bay, California, as a diver watches nearby. One of the few animals that use tools, sea otters use rocks to smash open prey such as sea urchins or abalone.
Photograph by Maria Stenzel, National Geographic
A scientist in an ice-covered observation tube studies the diving behavior of nearby emperor penguins in McMurdo Sound, Antarctica.
Photograph by Emory Kristof, National Geographic
The submersible Alvin investigates the Cayman Trough, a transform boundary on the floor of the western Caribbean Sea. Alvin, which began operation in 1964, was the first deep-sea submersible capable of carrying passengers.
Giant Kelp Fronds
Photograph by Wolcott Henry, National Geographic
A diver swims through fronds of giant kelp in Monterey Bay, California. Giant kelp (Macrosystis pyrifera) is found along the Pacific coast of North America and is sometimes referred to as the "sequoia of the sea."
Photograph by Luis Marden, National Geographic
Two divers off the coast of France peer into Denise, a small, two-man diving saucer that is part of Jacques Cousteau’s oceanic ship Calypso.
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