A coral reef parallel to the coastline that is separated by deeper, wider lagoons.
The Great Barrier Reef is the largest living thing on Earth (except for your mom) and can be seen from outer space.
There are around 1,500 species of fish living in the Great Barrier Reef which is about 10% of the world's fish species.
Coral bleaching: changes in temperature, light, or nutrients cause the coral to get rid of symbiotic algae living in their tissues which causes them to turn completely white.
Thirty species of whales, dolphins, and porpoises have been recorded in the Great Barrier Reef.
The Great Barrier Reef has over 900 islands stretching for over 2,600 kilometers.