This video says about itself:
Jellyfish Sunbathing Sessions | BBC Earth
27 May 2018
The Cassiopea isn’t just a normal jellyfish – they are solar powered, photosynthetic jellyfish, thanks to the symbiotic algae that live on them.
Tubular colonial jellies known as pyrosomes that arrived in 2014 along North America’s Pacific Northwest Coast appear to be adapting to cooler water and may become permanent residents: here.
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