We've dived Osbourne Sholals quite a number of times and always enjoyed it.  There is lovely overhang too small to be called cave which has a very pretty sponge garden.  It always has bullseye in it and quite a range of other fish.  The overhang is on the NE side of the reef.  Our second dive for the day.  It was quite surgy, especially at the northerly end.  We headed north and around the the north end of the reef but turned back relatively early.  We were getting close to deco time so headed back up.  Again, not a great dive on what is often a very lovely dive site.