just got back on the 1st from 12 days in paradise, got quite a infestation of pica pica, the diving was well worth it though!!, used suntan oil before the dives, but still got into my wetsuit, was told sunblock works much better, after you get it , not much you can do but spray down with windex and smear on the benedryl cream and wait it out, DONT SCRATCH!, the thimble jellyfish were very thick the top 15-20 ft. of water, no stings from them though, dont worry, go have fun and enjoy your dives. its a beautiful wonderful place!