What extreme habitats are there for algae?

Organisms such as algae are very ancient plants on our planet. Their world is very diverse and large, these creatures have inhabited various environments and habitats. They are most often found in fresh and salt water bodies, in puddles and in the soil. But there are also extreme conditions for them. These are, for example, cold ice of mountain peaks, hot mineral springs, etc. Some algae, in addition to coloring water in rivers and ponds, can change the color of snow. There are several types of algae, these are brown, green, red and others.