What do you think when you first see those pictures? Those might look like jellyfish or jewels but those are actually frozen methane bubbles. Despite the pretty sight, methane is a flammable gas so if one of these bubbles popped you wouldn't want to be close to one and you certainly shouldn't light a fire here. Also methane is a highly toxic gas. But if you're still curious then this is what happens when a bubble pops and you ignite a fire
So how did this happen?
The methane bubbles are formed when dead organic matter such as animals and plants sink into the bottom of the water and invite a bunch of bacteria. The bacteria then eats the matter and lets out methane gas which turns into these bubbles because of the frozen water.
If you're really curious and you're thinking of going to see it you can go visit the lakes in Canada such as Minnewanka and Vermillion Lake in Banff National Park.
Another interesing thing is that some bubbles form below other bubbles which then creates some kind of sequence of frozen bubbles and it's really bizarre yet beautiful.
Can you walk over those bubbles? Well I wouldn't say walk
But you can skate! Just remember to be careful of the methane gas if one of the bubbles pop!