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A reef is a
ridge of jagged rock, coral, or sand just above or below the surface of
the sea.
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Professor Nibble knows the most
about coral reefs. He has lived on 3 different tropical islands.
Reefs are a hazard to boats and ships. The sharp coral or rock of a reef can easily rip a hole in a boat. Tides are important. When the water is high, a boat might be able to safely float over some reefs. Other reefs are not safe to cross at any tide. |
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Although reefs are considered to be dangerous obstacles for boats and ships, they are a wonderland of sea life for the diver or snorkeler. On coral reefs there are many colorful fish and other sea life. Many islands have a reef that surround all or part of the coastline. This helps protect the island because the big waves crash onto the reef instead of the shore. |
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A close-up photo of a reef. Do you see the butterfly fish? |
Related Terms coast - reefs are sometimes found along the coast island - reefs are sometimes found near an island channel - a break in a reef allowing boats to pass through safely atoll - coral islands that form on top of a reef structure ocean - reefs are found in the ocean |
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© Nibble University 2000-2008
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