Astari 
Jellyfish Lake, scientifically known as Ongeim’l Tketau, nestles within the breathtaking landscape of Eil Malk Island.
The island is part of the Republic of Palau, an archipelago in the Western Pacific Ocean.
The lake, linked to the open sea through fissures in limestone rock, is a marine marvel.
Furthermore, Eil Malk Island, part of the UNESCO-listed Rock Islands, boasts limestone and coral formations.
The area surrounding it is characterized by lush vegetation, rocky outcrops, and the pristine beauty of the Rock Islands.
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Contents
The Ecological Marvels and Surrounding Area
The lake’s isolation from the open sea has fostered a unique ecosystem.
This has resulted in the evolution of the golden jellyfish, Mastigias papua etpisoni, which has become the defining feature of the lake.
Encompassing 5.5 hectares, the lake hosts a mesmerizing dance of golden jellyfish in an intimate setting.
The Golden Jellyfish
What sets Jellyfish Lake apart is its resident golden jellyfish.
These jellyfish have evolved in the isolated environment of the lake, developing a unique set of characteristics.
They have lost their ability to sting, making them harmless to humans.
Additionally, they have developed a symbiotic relationship with algae that lives in their tissues, providing them with a source of nourishment.
Swimming With Jellyfish
One of the most enchanting experiences is the opportunity to swim among thousands of these golden jellyfish.
The lake offers the surreal sensation of gliding through the water, surrounded by a gentle, undulating sea of translucent jellyfish.
The creatures’ rhythmic pulsations propel them through the water, creating a ballet of movement that is both serene and awe-inspiring.
Conservation Challenges and Initiatives
As a protected area, the conservation efforts have been initiated to monitor and protect this delicate ecosystem.
Implementing strict guidelines preserves the lake’s biodiversity, enabling responsible visitor experiences.
Moreover, there are requirements to rinse off any chemicals or contaminants before entering the water to maintain the lake’s pristine conditions.
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The History and Discovery Behind Jellyfish Lake
Approximately 12,000 years ago, Jellyfish Lake formed. Melting ice after the last ice age raised the sea level, flooding the basin.
The age estimation is derived from factors such as its depth, approximately 30 meters.
Therefore, the estimate considers sediment thickness and sea level changes after the last ice age.