What is a coral reef?
A coral reef is like an underwater city built by tiny animals called corals. They live in warm, sunny water and build hard skeletons out of calcium carbonate.
How do corals grow and reefs form?
Corals are tiny animals that live in groups. Each coral polyp adds a small skeleton. Over many years, these skeletons pile up and create a big structure called a reef. Other plants and animals move in and use the reef as a home.
Why are reefs important?
- They protect coastlines from waves.
- They are homes for many sea creatures like fish, sea turtles, and crabs.
- They support people who rely on reefs for food and tourism.
What threatens coral reefs?
- Warm oceans can make corals sick and turn them white (bleaching).
- Pollution and sediment can smother corals.
- Overfishing and careless activities can hurt reef life.
- More CO2 in the air makes the water more acidic, which weakens coral skeletons.
How can we help?
- Keep beaches clean and use reef-safe sunscreen.
- Protect and respect protected areas and eat sustainable seafood.
- Learn about reefs and tell others to care for them.