Sit back and watch this beautiful jellyfish swim.
This jellyfish was spotted in the Mariana Trench at a depth of 3,700m (the trench goes down to 10,994m) by the Deepwater Exploration of the Marianas expedition on April 24, 2016.
Scientists don't know exactly what species this is, they only identified its genus: Crossota.
In the first part of the video, the jellyfish is supposed to be in an ambush predation mode. Unless it's just sending a mission report to its original planet.
In the second part, while you enjoy watching it slowly drifting, you can observe in red what most likely are its radial canals (the canals that come of the central stomach and distribute the digest food in the body) and in yellow its gonads (reproductive gland).
You can learn more about the expedition here.