Chuck Yeager
It is made up of coral.
reef
Blacktip reef sharks have evolved to have long thin serrated teeth. This is best for their diet of reef fish, it makes it easier to feed.
it makes it cloudier
Reef can be a noun or a verb. An example of reef as a verb is that someone can reef a sail by folding or bunching it up. Reef is a noun when used to refer to an underwater rock or ridge.
The depth of the Great Barrier Reef varies. The coral which makes up the Great Barrier reef is believed to extend to a depth of around 500m in some places, but the actual living polyps only go down as far as 30 metres. The water in the channel between the shoreline and the reef reaches about 60 metres in depth.
The hard coral polyp makes the coral
This is the world's largest coral reef, the Great Barrier Reef. It is over 2300 km in length, and the only living organism visible from space. The Great Barrier Reef lies off Australia's northeast coast, in the Coral Sea.
The Great Barrier Reef is the world's largest reef system. It is made up of over 2,900 different coral reefs.
In places it is. The coral which makes up the Great Barrier reef is believed to extend to a depth of around 500m (1640 feet) in some parts of the Reef. However, the living polyps themselves only go down as far as 30 metres (almost 100 feet). The water in the channel between the shoreline and the reef reaches about 60 metres (197 ft) in depth.
Topsoil that washes onto a coral reef as a result of human interaction makes the water cloudier, reducing photosynthesis.