There is also a possibility of visiting one of the other jelly fish lakes. You would need someone to assist you in getting permission from the Koror government, not the easiest thing but it really depends on who is helping you and who they know personally, and that is really the biggest hurdle. It also helps to have a valid sounding reason to want to go other than "I just want to see jellyfish." Next, you would have to be in great shape because the path is a bit treacherous since it is not cleared and involves climbing up and then down the side of the rock island and the possibility of crocodiles in the lake, in short, you need to be in great shape because it will be a serious adventure. If you have the fortitude and good fortune to go though, it is well worth it since it is very rarely seen by anyone.