Greet Barrier Reef
A WARNING: If going diving, be sure to make mutual arrangements with other members of your group to insure you are on the boat returning to shore and, if you’re not, to alert the boat crew right away of your absence.
It has happened that divers have been left behind and haven't been seen again.
Remember, too, that there may be perils in the water from stingrays, stonefish and other dangerous creatures. Know what they are, take precautions, it's relatively easy to be safe.