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Coral reefs are like islands in a vast ocean looking for their meal to come in. They act as a magnet attracting other species to live in their proximity. A coral reef is an example of predators and prey coexisting: schools of parrot fishes gather there for their procreative act. They send clouds of eggs and sperm simultaneously. Sometimes these fishes eat part of corals themselves; and their presence brings in manta rays who time their arrival to make a meal of their eggs and sperm. Thus indirectly they curb the damage the fishes could inflict on the reef. Tigersharks also drop in for their feed. Green turtle hatches there while octopuses, mandarin fishes and many other species use it for furthering their own biological programs.
benny