image creditEvery day, millions of golden jellyfish migrate - no big surprise there. However, you might not expect them to migrate horizontally across a lake. Still, a visit to Jellyfish Lake on Eil Malk, an island in Palau, in the Pacific Ocean, will confirm just that. Yet just how on Earth did these jellyfish get to the lake in the first place?
To begin with, the body of water that is called Ongeim'l Tketau in Palauan is a marine lake. It connects to the sea via tunnels and fissures in the limestone that encases it. Even so, the lake is isolated - the golden jellyfish in the lake are different to those which swim in the sea just a stone's throw away. As you descend under the water, a new and alien world presents itself.
(thanks Robert-John)The Presurfer
