Strange - Jellyfish evolution
by Marshall Brain
Description from the video:
The jelly fish came to this lake in Palau through a tunnel which connected the sea and the lake a long time ago. Now the tunnel has closed, and the jelly fish came to have no poison in an environment where there’s no predator. They live by photosynthesis because they cannot feed on anything in this lake. This lake is such a heaven to them that there are just so many of them living here.
More info on the jellyfish and Palau: Palau Jellyfish Lake
See also: How Jellyfish Work
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