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coral reef
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Images & Videos
Great Barrier Reef sea fan lagoons Great Barrier Reef, Queensland
How do corals reproduce?
crown-of-thorns sea star
What causes coral bleaching on the Great Barrier Reef?
How can coral reefs be protected from sunscreen damage?
coral bleaching near the Mariana Islands Coral reef in the Red Sea
For Students
coral reef summary
Quizzes
Taj Mahal, Agra, India. UNESCO World Heritage Site (minarets; Muslim, architecture; Islamic architecture; marble; mausoleum)
Wonders of the World Quiz
Chutes d'Ekom - a waterfall on the Nkam river in the rainforest near Melong, in the western highlands of Cameroon in Africa.
Ecosystems
Related Questions
Read Next
Great Barrier Reef coral bleached area map and infographic
How and Where Coral Bleaching Is Affecting the Great Barrier Reef
Great Barrier Reef coral bleached area map and infographic
Coral Bleaching: A Threat to Our Reefs
Charles Darwin, carbon print photograph by Julia Margaret Cameron, 1868.
What Darwin Got Right (and Wrong) About Evolution
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Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.
10 Famous Artworks by Leonardo da Vinci
A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England
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Mayer Amschel Rothschild (1744-1855), founder of the house of Rothschild; lithograph by Friedrich Lieder, c. 1830.
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Rural Irish landscape, Sligo, Ireland.
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America’s 5 Most Notorious Cold Cases (Including One You May Have Thought Was Already Solved)
Thumbnail for flags that look alike quiz Russia, Slovenia, Iceland, Norway
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Videos

How do corals reproduce?
Learn how the corals of the Great Barrier Reef reproduce.
Video: Encyclopædia Britannica, Inc.
What causes coral bleaching on the Great Barrier Reef?
An overview of coral bleaching on the Great Barrier Reef.
Video: Encyclopædia Britannica, Inc.
How can coral reefs be protected from sunscreen damage?
Development of a biodegradable bead that can soak up the coral-killing sunblock ingredient,...
Video: © American Chemical Society (A Britannica Publishing Partner)
Behaviors of butterflyfish and squirrelfish
Learn about butterflyfish and squirrelfish.
Video: Contunico © ZDF Studios GmbH, Mainz
Various fish species in South Pacific coral reefs
Explore a coral reef in the South Pacific and learn about its diverse fish population,...
Video: Contunico © ZDF Studios GmbH, Mainz; Thumbnail © Vlad1949/Dreamstime.com
Learn about ecological succession with the help of a sunken ship, S.S. President Coolidge to demonstrate the process in a tropical coral reef
Ecological succession happens when new life takes over an environment. Here, a sunken...
Video: © Sam Cossman (A Britannica Publishing Partner)
The rich ecosystem of the South Pacific atolls
Learn about the plant and animal life of Fakarava island, French Polynesia.
Video: Contunico © ZDF Studios GmbH, Mainz
How cleaner fish help maintain coral reefs
Learn about cleaner fish and remora, two fishes often found in coral reefs.
Video: Contunico © ZDF Studios GmbH, Mainz; Thumbnail © Wirestock/Dreamstime.com
Grey reef sharks in coral reef ecosystems
Learn about the grey (or gray) reef shark, including its mating behaviours.
Video: Contunico © ZDF Studios GmbH, Mainz

Images

Great Barrier Reef
The Great Barrier Reef, off the coast of Queensland, Australia, is the world's largest...
© Ignacio Palacios—Stone/Getty Images
sea fan
Sea fan (genus Gorgonia), a branching variety of coral, beside an array...
© Herbert Schwarte/FPG International
lagoons
Lagoons lie behind the coral reef and barrier islands surrounding Raiatea and Tahaa...
© Nicholas DeVore III/Bruce Coleman Inc.
Great Barrier Reef, Queensland
Great Barrier Reef, off the coast of Queensland, Australia.
© laine1/Fotolia
crown-of-thorns sea star
Crown-of-thorns starfish (Acanthaster planci).
A. Giddings—Bruce Coleman Inc.
coral bleaching near the Mariana Islands
Coral bleaching in a shallow coral reef off the coast of the Mariana Islands.
David Burdick/NOAA
Coral reef in the Red Sea
Coral reef in the Red Sea.
© Digital Vision/Getty Images
A diver exploring a coral reef in the Maldives.
© Jakub Gojda/Dreamstime.com
coral reef
Between 4,000 and 5,000 species of fish—perhaps a third of the world's marine fish—live...
© Digital Vision/Getty Images
fringing reef
Fringing reef formations around islands in the Pacific Ocean.
© Getty Images
fringing reef
Fringing reef near Eilat, Israel.
Mark A. Wilson (Department of Geology, The College of Wooster)
Great Barrier Reef: coastal buildup
Buildup of coral on the Great Barrier Reef, off the northeastern coast of Australia.
© tororo reaction/Shutterstock.com
Great Barrier Reef
Aerial view of the Great Barrier Reef, off the northeastern coast of Australia.
© cool chap/Fotolia
reef formations
Aerial view of reef formations, South Pacific.
© Digital Vision/Getty Images
coral bleaching of Australia's Great Barrier Reef
By the summer of 2016, a large portion of the northern sector of Australia's Great...
Encyclopædia Britannica, Inc./Kenny Chmielewski
Endangered coral reefs.
Encyclopædia Britannica, Inc.
endangered coral reefs
Map of endangered coral reefs worldwide.
Encyclopædia Britannica, Inc.
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