coral reef

Their purpose lies inherently deeper: providing the building blocks for sustaining a rapidly depleting coral reef environment.

The rainbow of life in a coral reef is founded on the partnership between polyps and algae.

All the islands are low and wooded, and surrounded by a coral reef of small extent.

Once they were beached on a coral reef, and it was all they could do to get the boat off again into deep water.

She was driven on to a coral reef in a bad storm off the coast of Taviuni.

We afterwards found that this coral reef extended quite round the island, and formed a natural breakwater to it.

There are three kinds of coral reef—namely, fringing reefs, barrier reefs, and atolls.