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A bloom of algae from up above
Photo

Algae Bloom Brings a Red Tide

An algae called Karenia brevis can bloom into a sea of red when there are...
The Peninsula Valdes in Argentina was inscribed on the World Heritage List in 1999. The site is home to important breeding populations of the endangered southern right whale (Eubalaena australis), southern elephant seal (Mirounga leonina), and southern sea
slideshow

Marine World Heritage Photo Gallery

Marine World Heritage is a prestigious list of 43 marine ecosystems and...
Tue, 11/09/2010 - 11:54
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
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...
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...
In some reefs, small fishes such as this broad-barred goby protect corals by eating invading seaweeds.
Photo

Coral Goby Cleans Coral

One of the first signs of a sick coral reef is seaweed creeping across...
Kelps are large, brown algae that grow along coasts around the world, especially in cooler regions.
Photo

Kelp Pennant

"Fronds of giant kelp, buoyed by their gas-filled pneumatocysts, wave like pennants...

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