Via TheSpaceAcademy.org:
This is not CGI. This is a real-life creature known as a sea angel (Clione sp.) hovering under ice in the White Sea, Russia. pic.twitter.com/BD2sLXxlmt
— TheSpaceAcademy.org✨đź” (@ThespaceAcad) November 29, 2020
Their entire feed is interesting
Correction: I inadvertently lied in the headline. A quick look at Denmark's Polar Portal shows the White Sea is not yet frozen:
If you follow the 40° East Longitude line from the lower right corner, the first water you hit is the White Sea, and the Danes seem pretty adamant that it is not frozen.
