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Close-up photograph of translucent coral polyps, showing the symbiotic algae living inside.
slideshow

Zooxanthellae and Coral Bleaching

Tiny plant-like organisms called zooxanthellae live in the tissues of many animals,...
Thu, 12/03/2009 - 12:14
Small red hyperiid.
slideshow

The Hyper Eyes of Hyperiids: How Some Shrimp-Like Creatures See Light in the Deep Sea

Hyperiid amphipods are small crustaceans related to sand fleas and distantly...
Tue, 08/19/2014 - 10:47
A team of scientists explore the Arctic ocean.
slideshow

Under Arctic Ice

Hidden beneath Arctic ice is a world few have ever seen. Take the icy plunge with a...
Tue, 01/04/2011 - 14:48
Mangrove roots provide an underwater habitat for many marine species.
slideshow

Mangroves: Photos of Plants and Animals

Mangrove is the name for a tree—and also for a complex ecosystem—that bridges...
Mon, 09/29/2014 - 11:48
Mangrove Salt Glands
Photo

How Mangroves Deal with Saltwater

Looking at a white mangrove (Avicennia marina) leaf cross-section under the...
Red Algae
Photo

Branching Red Algae

Under the microscope, you can peer inside the cells of this filamentous red algae....
A spiraled diatom with spines.
Photo

A Diatom Helix

This beautiful marine diatom Chaetoceros debilis was caught in the North Sea. Not...
Unlike the green, leafy algae we're used to seeing, coralline algae has a hard crust—which you can see here at the molecular level under a scanning electron microscope.
Photo

Coralline Algae Under the Microscope

Unlike the green, leafy algae we're used to seeing on the seafloor, coralline algae...
Fish have certain adaptations, like blood with built-in antifreeze, to survive in the Antarctic.
Photo

Fish Adapt to Icy Water

This shadowy fish, Trematomus bernacchii, is well adapted to the ice-cold...
Weddell seals grind their teeth on holes in the ice to keep them open to their comings and goings between ocean and air.
Photo

Weddell Seal in Antarctic Water

Weddell seals grind their teeth on holes in the ice to keep them open to their...
Broad-leaf seagrass (Posidonia australis) with algae epiphytes grows at Corner Inlet Marine National Park in Australia.
Photo

Seagrass with Epiphytes

Broad-leaf seagrass (Posidonia australis) with algae epiphytes grows at Corner...
Coral Sand
Photo

Coral Sand Under a Microscope

Coral sand is aptly named: it's sand made up of tiny bits of coral and other ocean...

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