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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...
A squat lobster and blackbelly rosefish find shelter on a Lophelia pertusa coral reef off the southeastern United States.
overview

Deep-sea Corals

It may be the last place you’d expect to find corals—up to 6,000 m (20,000 ft)...
April 2018
On Moorea, an island in French Polynesia, researchers are striving to complete a biocode—a DNA catalog of every life form big enough to pick up with tweezers.
overview

Scientists Catalog Life on the Island of Moorea

Welcome to Moorea, a tiny, isolated island in the middle of the vast Pacific....
April 2018
Corals, sponges, and algae are the major components of most coral reef communities as shown in this picture.
overview

Corals and Coral Reefs

Coral reefs are the most diverse of all marine ecosystems. They teem with life,...
April 2018
Fish swim in Cabo Pulmo Marine Reserve off the Baja California peninsula.
overview

How Laws Around the World Help Improve Ocean Health

Solving environmental problems often starts with small groups of people working to...
April 2018
Seagrasses are flowering plants that can form dense underwater meadows and are an important shallow water habitat.
overview

Seagrass and Seagrass Beds

Seagrasses are found in shallow salty and brackish waters in many parts of the...
April 2018
Red Algae
Photo

Branching Red Algae

Under the microscope, you can peer inside the cells of this filamentous red algae....
Tiny sponge spicules.
Photo

Sparkling Sponge Spicules

These sparkling sponge spicules are microscopic needle-like structures that many...
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...
A pearly razorfish
Photo

Pearly Razorfish

The pearly razorfish’s name may be slightly misleading since it is neither as...
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...
The mandarinfish lives in western Pacific tropical coral reef ecosystems and lacks the scales that are typically seen on bony fish.
Photo

Mandarinfish Duo

These beautiful mandarinfish (Synchiropus splendidus) are covered in bright blue,...

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