Coral reefs by Isaac Benhaimoud

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Coral reefs by Isaac Benhaimoud

  1. 1. by Isaac David Benhaimoud CORAL REEFS
  2. 2. THE CORAL REEFS A living coral reef is an underwater ridge or mound built of fragments of coral sands and limestone. The Great Barrier-Australia This is the largest coral reef. It it is visible from the space.
  3. 3. <ul><li>. </li></ul><ul><li>Corals grow in clean water with temperatures between 20 and 30 Cº. </li></ul><ul><li>They also need light. </li></ul><ul><li>A special type of algae live in association with corals: the zooxanthellae, which produce the different colours. </li></ul>
  4. 4. RICH UNDERWATER LIFE A lot of species living in the coral reefs; 400 species of corals, 1800 different species of fish,125 of sharks and 5000 of molluscs.
  5. 5. THE MESO-AMERICAN REEF It is the second largest coral reef in the world.
  6. 6. CORAL BLEACHING <ul><li>Coral bleaching is the whitening of corals due to the increase of temperature over prolonged periods of time and pollution. </li></ul><ul><li>Corals expel algae living with and lose all their colour and their ability of building more reefs. </li></ul>

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