Jellyfish Lake

The lake is marine, 30 m deep, and characterized by both oxic and anoxic water layers separated by a distinct chemo-and thermocline. Above 15 m, the lake is well lighted, oxic, and with normal marine salinity and temperatures. Below that, the lake is dark and anoxic with high sulfide content in the water and sediment. The locals tell visitors before they jump in the water: "when you see 1000 jellyfish, keep going, when you see 10,000 jellyfish, keep going, when you see 100,000 jellyfish, keep going, when you see 1,000,000 jellyfish, stop, you're there." This is a unique snorkeling experience! Eil Malk Island Jellyfish Lake is also known as Ongeim'l Tketau.