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The Ocean Blog

Dip your head below the water's surface in a mangrove forest and an entirely new ecosystem is revealed. The twisting mangrove roots, which appear to float unrooted in the water, support a great...
A cnidarian brought up from the Arctic seafloor more than 2000 meters (6562 feet) deep.
A still from The Changing Sea , part of the 19th Annual Environmental Film Festival in the Nation's Capital.
The Baltic is a brackish sea, a unique combination of freshwater from rivers in the surrounding countries and salt water from the ocean. The low salinity levels are one of the factors that determine...
Giant anemone. More about mangrove ecosystems can be found in the Mangroves section .
Two bright orange anemonefish ( Amphiprion ocellaris ) poke their heads between anemone tentacles. Anemonefish are able to swim amongst the stinging tentacles without getting stung — but no one knows...
Despite the cold and dark environment, soft-bodied animals like anemones abound under the ice. Using their sticky arms, they grab zooplankton, which can be hard to come by during the long winter with...
How does a coral spend its day? Most of us would say: not doing much. To the human eye, a coral looks relatively still, waiting in the current and hoping some food will run into its tentacles. But...
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