Have you ever imagined diving among hundreds or even thousands of jellyfish? Kakaban Lake that located at Kakaban Island on East Borneo Indonesia is the largest jelly fish lake in the world, and also second brackish water lake in the world.
The lake was originally a sea water that trapped on an island. Kakaban lake is formed due to reef that rises above sea level to a height of 50 meters. Then, this reef makes some sea water inside, and formed a lake. Gradually the lake water changes the hardness, becoming more tasteless than the surrounding water. The lake is surrounded by mangrove trees and around the island itself covered by dense trees.
There are only two Brackish water lake that inhabited by thousands of jellyfish, namely Lakes Kakaban and Jellyfish Lake in Palau, Micronesia in the southeastern Pacific Ocean.
This brackish water lake has a unique ecosystem, because it is inhabited by endemic animals and plants. Some of them are jellyfish that lost of their sting capabilities, a carpet of algae in the lake, and white anemones.
Kakaban Lake nominated for the UNESCO’s world heritage site, because it has 4 types of jellyfish. The four types of jellyfish are moon jellyfish, spotted jellyfish, box jellyfish and upside down jellyfish. While the Jellyfish Lake in Palau, Micronesia only having 2 types of jellyfish. So that why this Kakaban lake is the largest jellyfish in the world.
Upside down jellyfish is the most unique because this jellyfish located at the bottom of the lake with tentacles facing upwards. One thing that is strange, because usually jellyfish are upwards and their tentacles facing down.