Introduction

Corals come in hundreds of different shapes, sizes and colours. The polyps of hard, or reef building corals, sit within a cup that it has made out of calcium carbonate (limestone). This substance is produced very slowly and eventually sticks to that made by neighbouring polyps to create a large coral colony, and eventually a whole reef. Given enough time reefs can get so big they can be seen from space – just like the Great Barrier Reef in Australia.

Corals come in hundreds of different shapes, sizes and colours. The polyps of hard, or reef building corals, sit within a cup that it has made out of calcium carbonate (limestone). This substance is produced very slowly and eventually sticks to that made by neighbouring polyps to create a large coral colony, and eventually a whole reef. Given enough time reefs can get so big they can be seen from space – just like the Great Barrier Reef in Australia. Corals come in hundreds of different shapes, sizes and colours. The polyps of hard, or reef building corals, sit within a cup that it has made out of calcium carbonate (limestone). This substance is produced very slowly and eventually sticks to that made by neighbouring polyps to create a large coral colony, and eventually a whole reef. Given enough time reefs can get so big they can be seen from space – just like the Great Barrier Reef in Australia.

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