storm

We've set up a 7 day liveaboard on Spoilsport (Coral Sea, Ribbon Reefs, Lizard Island, Bougainville Reef & Osprey Reef) for mid-March. I've read that this is both jellyfish and cyclone season. What precautions would you expect to have to take against jellyfish at this time of year? How bad are...

I need to agitate sand/small pebbles at the depth of 10 - 15 meters. Best way to describe what I would like to do is (in such order): Recreate sea storm on a mini level at the selected small area of the sea floor. Pressure wash small area of the sea floor. What can I do to achieve that...