Coral reefs are the largest marine ecosystem on Earth, covering an area of over 284,000 square kilometers.

Coral reefs are home to an estimated 25% of the world's marine species, despite covering less than 1% of the ocean floor.

Coral reefs provide food and shelter for a wide variety of marine life, including fish, mollusks, crustaceans, and echinoderms.

Climate change is the main threat to coral reefs, as rising sea temperatures cause corals to bleach and die.

Coral bleaching occurs when corals expel their symbiotic algae, which provide them with food and color.

The Great Barrier Reef is the largest coral reef system in the world, stretching for over 2,300 kilometers along the coast of Queensland, Australia.

The Mesoamerican Barrier Reef is the largest coral reef system in the Western Hemisphere, stretching for over 1,000 kilometers along the coast of Mexico, Belize, Guatemala, and Honduras.

The Red Sea Coral Reef is the largest coral reef system in the Red Sea, stretching for over 2,000 kilometers along the coast of Saudi Arabia, Egypt, Sudan, and Eritrea.

The Coral Triangle is the largest coral reef system in the world, covering an area of over 6 million square kilometers and including parts of Indonesia, Malaysia, the Philippines, Papua New Guinea, and Timor-Leste.

The Coral Triangle is the largest coral reef system in the Indian Ocean, covering an area of over 6 million square kilometers and including parts of Indonesia, Malaysia, the Philippines, Papua New Guinea, and Timor-Leste.

The Coral Triangle is the largest coral reef system in the Pacific Ocean, covering an area of over 6 million square kilometers and including parts of Indonesia, Malaysia, the Philippines, Papua New Guinea, and Timor-Leste.

The Mesoamerican Barrier Reef is the largest coral reef system in the Atlantic Ocean, stretching for over 1,000 kilometers along the coast of Mexico, Belize, Guatemala, and Honduras.

The Mesoamerican Barrier Reef is the largest coral reef system in the Caribbean Sea, stretching for over 1,000 kilometers along the coast of Mexico, Belize, Guatemala, and Honduras.

The Mesoamerican Barrier Reef is the largest coral reef system in the Gulf of Mexico, stretching for over 1,000 kilometers along the coast of Mexico, Belize, Guatemala, and Honduras.

The Red Sea Coral Reef is the largest coral reef system in the Mediterranean Sea, stretching for over 2,000 kilometers along the coast of Saudi Arabia, Egypt, Sudan, and Eritrea.