This is
not from a reliable source.
The Russian outlet RT claims a photographer got some photos of methane gas bubbles in a very cold lake in Alberta Canada. As the bubbles rose they look like giant jelly fish.
But to me it looks like large pancakes floating in blueberry syrup.
Short video:
https://www.rt.com/news/450715-frozen-methane-clouds-alberta-lake/What do you think?