Coral reefs are rich in life, but are dying around the world. This page explores some of the problems in further detail. Coral reefs, the “rainforests of the sea,” are some of the most biodiverse and productive ecosystems on earth. They occupy only.2% of the ocean, yet are home to. IMPORTANCE of CORAL REEFS. Coral reefs are important for many reasons. Most importantly, they provide protection and shelter for many different species of fish. Coral Reefs 1. CORAL REEFS Sambavan Jeyakumar Yr 7 2. What Are They? Coral reefs are structures found underwater, constructed of calcium carbonate secreted. How Are Coral Reefs Being Destroyed?. Coral requires a narrow range of conditions to properly grow: clear water less than 330 feet deep and warmer than 68 degrees F. CORAL REEF SYMBIOSIS. Symbiosis comes from the words sym which means together and biosis which means life. Symbiosis occurs when two organisms create a union. Weather of Coral Reefs. Coral reefs are immobile living structures that require warm tropical waters to grow. Corals take thousands of years to grow and need stable. Why Are Coral Reefs So Important? Hidden beneath the ocean's waters, coral reefs teem with life. Fish, corals, lobsters, clams, seahorses, sponges, sharks, and sea. Coral reefs contain colorful and amazing animals, but are threatened by human activities. Images, videos, and facts from around the world. Coral Reefs Coral are extremely ancient animals that evolved into reef-building forms over the last 25 million years. Coral reefs are among the most biologically.