How Long Have Corals Been Around?

I think people generally think corals only live in hot countries and in tropical regions. But we get them round the uk. Don't we? Thend also, you'll get them right in the bottom of the ocean! Yes, very much so. We have quite significant coral reefs, certainly off the coast of scotland,. ar that form very big structures here. They are yet theyr n another place in the world, opposit, the tropics, is where we have the most diversity and the most significant structures - things like the great bow reef That every one knows. There are corals all over. How long have corals been around for? When did they first