Can't say for sure, but having visited last year and found them submerged, given the amount of water around this year my £5 is on them being invisible (again!).
I was there around 3 years ago and the water level was at 11.70 metres, not all the boulders were out then but ended up climbing on the shark, marlin and tiddler boulders. Anything below 10.00 metres and they would probably all be above the water line.
Currently it says it's at 12.27 metres on this site: