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Coral Reefs Changing Over Time

How do we know what coral reefs looked like hundreds of years ago? Often times, we...

slideshow

Zooxanthellae and Coral Bleaching

Tiny plant-like organisms called zooxanthellae live in the tissues of many animals,...

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Staghorn Coral

Staghorn (seen here) and elkhorn corals are listed as Threatened under the U.S....

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Unhealthy Coral Reef, Kiritimi, Line Islands

Algae has overtaken this coral reef off heavily populated Kiritimati, or Christmas...

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What Is Coral? A Coral Polyp and Zooxanthellae

What are corals? Corals themselves are animals. But tropical reef-building corals...

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Coral Reef on Gangga Island, Indonesia

Corals, sponges, and algae are the major components of most coral reef communities....

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Exploring a Reef

A scuba diver explores elkhorn corals (Acropora palmata) growing on a tropical...

Article

Ocean Objects of Wonder

As humans, we are constantly learning. Not only as individuals from the moment we...

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Encrusting Pink Algae and a Seastar

Like pink paint, crustose coralline algae covers the surface of the rock in a thin...

Personal Perspectives

Coralline Algae: The Unsung Architects of Coral Reefs

Stare at a tide pool and you will often see a crust of pink coating the bottom. No,...

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Pink Coralline Algae

Many species of pink coralline algae cover a reef surface in the Southern Line...

Personal Perspectives

Helpful Herbivores

When snorkeling in the Kahekili Herbivore Fisheries Management Area (KHFMA) in West...