Snorkeling in this lake is nothing new, but mustering up the courage is something this woman did very well.
According to the Go Pro YouTube page, Nana Trongratanawong, snorkeled in Jellyfish Lake located on a remote island in Palau.
As you can see, there are numerous Jellyfish that live in this lake. Snorkeling is allowed but scuba diving is not. The reason is the anoxic layer that starts at 15 meters deep. It has deadly amounts of hydrogen sulfide? that can be absorbed by the skin. All organisms that require oxygen live above this layer.
The lake is connected to the ocean by three tunnels that lie near its surface.