Coral reef
From Simple English Wikipedia, the free encyclopedia
A coral reef is a large underwater wall made of dead and living coral. It acts as the home of many tropical fish and other animals.
People look at them while snorkeling and diving. One example of a coral reef is in Malaysia at Pulau Tioman, off the State of Pahang.
Coral reefs can be very dangerous to ships, because they are usually under water, but close to the top. This makes it hard for ships to see them, but easy for ships to hit them.