Jellyfish Lake was once connected to the waters of the Pacific ocean, but is now completely isolated. The large population of jellyfish living here was believed to be missing those stinging cells, also known as nemastocysts, but it turns out they do have them, only they’re really tiny. That’s why it’s perfectly ok for people to swim so close to the jellyfish, our tissue doesn’t feel the sting.
Jellyfish Lake (Palauan: Ongeim’l Tketau, “Fifth Lake”) is a marine lake located on Eil Malk island in Palau. Eil Malk is part of the Rock Islands, a group of small, rocky, mostly uninhabited islands in Palau’s Southern Lagoon, between Koror and Peleliu. There are about 70 other marine lakes located throughout the Rock Islands. Jellyfish Lake is one of Palau’s most famous dive (snorkeling only) sites. It is notable for the millions of golden jellyfish which migrate horizontally across the lake daily.