Jelly Fish lake is a small deep lake in the middle of a small isolated tropical island. You arrive by boat and endure a short walk through the tropical forest up a steep incline over the edge of the lake. At first glance it appears to be a normal land traped lake but then you go in snorkelling! The lake is filled will jellyfish. These jellyfish have been landlocked and isolated for so long that, due to the lack of any natural predator, they have lost the ability to sting. This is a relief as you cannot avoid pushing them out of the way as you swim. From very small jelly fish to jelly fish up to about 30 - 40 cm in diameter, it is an amazing sight. Aparently the jelly fish live in a perfectly symbiotic relationship with bacteria or algae that feeds on sun light. The jelly fish migrate east to west every day to maximise the amount of sunlight they can provide to the hitchhiking bacteria. An amazing experience. Caution is needed not to dive more than 1 - 2 meters in depth. There is a very cold inversion layer deeper in the lake and the deeper you go the more toxic the lake's water. Swimming on the surface is absolutely no problem at all but definately no scuba diving.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.