Admire the strange 'jellyfish' phenomenon in Canada

Visitors are stunned to see glacial lakes in Banff National Park in Alberta, Canada, seemingly filled with strange floating creatures, trapped under the frozen lake.

Paul Zizka, 35, recorded images of unusual "jellyfish" flocks visiting Lake Minnewanka, Lake Vermillion and Lake Abraham in Banff National Park. In it, Lake Abraham is the most photographed place for this amazing phenomenon.

According to experts, strange phenomena occur when permafrost is permanently in the area that begins to melt. Organic materials that accumulate at the bottom of the lake begin to thaw and the bacteria will decompose them, releasing methane.

Gas methane does not dissolve into water, which forms bubbles floating on the surface of the lake. In the summer, simple methane bubbles will surface and explode to spread into the air. However, when the lake surface freezes in the winter, bubbles are trapped on the surface of the lake, forming trapped "jellyfish" flocks.

Professor Katey Walter Anthony of the University of Alaska (USA) likens this phenomenon to a "time condensation image" of methane emissions from frozen lakes. However, this expert notes, methane bubbles can be very dangerous.

A methane molecule has the capacity to store 25 times more heat than carbon dioxide. So if you detonate one of the methane bubbles and leave a match nearby, it will burn.