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Coral

✨ The Island Builders

Coral may look like underwater plants or rocks, but it is actually made up of tiny animals called coral polyps. These small organisms live together in large colonies and build hard structures from calcium carbonate, creating the foundations of coral reefs. Most reef-building corals live in warm, shallow seas where sunlight can reach them.

Inside their tissues, many corals host microscopic algae that provide them with energy through photosynthesis. In return, the corals offer the algae a protected place to live. This close relationship helps coral reefs grow and support a wide variety of marine life. Coral reefs are among the most diverse ecosystems in the ocean.

They provide shelter and feeding areas for many fish, crustaceans, and other marine species. Although individual coral polyps are very small, colonies can grow over many years and form large reef systems. However, corals are sensitive to changes in their environment.

Rising ocean temperatures can cause coral bleaching, a process where corals lose their algae and become weakened. Pollution, destructive fishing practices, and ocean acidification also threaten reefs around the world. Protecting coral habitats is essential for maintaining the biodiversity and balance of marine ecosystems.

💡 Did you know?

Did you know that coral is a nocturnal animal? During the day, the polyps remain hidden in their stone skeleton. But as soon as the sun sets, they bring out their thousands of tiny tentacles to catch invisible plankton in the water. They then look like a field of small animated flowers.

The Great Barrier Reef in Australia is so immense (more than 2,300 kilometers!) that it is considered the largest structure in the world built by living beings. It is so large that it can be perfectly seen from the Moon!

Coral has a secret for growing: it works with a small alga called Zooxanthella. The alga lives inside the coral, gives it its beautiful colors, and manufactures food thanks to the sun. In exchange, the coral offers it solid shelter. It's a perfect friendship pact.