(click to enlarge)

The northern Great Barrier Reef, where surf breaks on the weather side.  Corals need to be tough to even begin life here.  A constant flow of surfs flows across the reef, except at low tide when the reef might dry or be reduced to shallow pools for a few hours.  Pictures with a Sony digital T-1

In deeper water a brain coral in trouble.  Something was attacking it.  Maybe this is the way life goes on a coral reef?  Eventually it might recover.  So much to learn and not much time to know all the answers.