1. Coral Reefs

Coral reefs are some of the most diverse ecosystems in the world. Thousands of species rely on reefs for survival. Thousands of communities all over the world also depend on coral reefs for food, protection and jobs.

A reef is a strip or ridge of rocks, sand, or coral that rises to or near the surface of a body of water. The best-known reefs are the coral reefs developed through biotic processes dominated by corals and calcareous algae.

1.1. Corals 1.1.1. Types of Corals 1.2. Zooxanthellae 1.3. Coral Formation and Types Figure 1. Types of Coral Reefs 2.1. Location of Coral Reefs Figure 2. Global distribution of Coral Reefs 2.3. Threats to Coral Reefs 2.3.1. Climate Change 2.3.2. Unsustainable Fishing 2.3.3. Pollution 2.4. Coral Reefs in India Figure 3. Coral Reefs of India