Exploring Coral Reefs

Coral reefs are underwater structures made by tiny animals called coral polyps. They are some of the most colorful places on Earth. Reefs are home to thousands of kinds of fish, turtles, and other sea creatures. Scientists explore coral reefs to learn about ocean life and protect these important habitats.

How Scientists Explore Reefs

Scientists explore coral reefs by scuba diving and snorkeling. They also use underwater cameras and robots. Some researchers tag fish to track where they go. Others take small samples of coral to study in labs. Satellites and drones help map large reefs from above.

Why Coral Reefs Need Help

Coral reefs are in trouble because of pollution and warming oceans. When the water gets too warm, corals turn white and can die. This is called coral bleaching. Scientists are working to find ways to save reefs. Some are even growing new coral in underwater nurseries and planting them on damaged reefs.

Fun Facts

• Coral reefs cover less than 1 percent of the ocean floor but support about 25 percent of all ocean species.
• The Great Barrier Reef in Australia is so big it can be seen from space.
• Some coral reefs are thousands of years old.

Did You Know?

Coral reefs are sometimes called the rainforests of the sea because so many different animals live there.