rhamphotheca:

Mosaic Jelly (Thysanostoma thysanura)

A mosaic jellyfish floats serenely in  the waters of the Coral Sea, about 100 nautical miles from Cairns, Australia. Jellyfish are
ubiquitous in the Earth’s oceans. They can  thrive in warm water and
cold, along coastlines or out in the deep.  Their bodies are about 95
percent water. And though they have no brains,  jellyfish have somehow
been smart enough to survive for over 500  million years.

Photograph by Melissa Fiene, My Shot

(via: National Geographic)