I just found out that box jelly fish are sometimes present about one after a full moon. We were planning on coming down on 5/5 and doing a Na Pali coast tour on the 6th which would be prime time for box jelly fish. Our dates may be flexible and our other option is to come down on 5/9 instead. Should I change the date of my trip? Is this a pretty common occurrence, or does it happen more frequently on Ohau? The only problem with changing the dates is the airfare might be more expensive.