Yellowstone national park has the highest concentration of thermal features anywhere in the world, but it is far from a sterile place as far as living organisms are concerned — even in the hottest of the hot springs, “life has found a way”.
Two groups of microorganisms (Archaea and Bacteria) are the foundation of Yellowstone’s thermal ecosystems. By utilizing the chemical elements liberated by steam and boiling water from the rocky matrix, they build vast and deep mats of bacteria that encircle the hot pools, different species existing in different thermal gradients from just below boiling temperature to simply “hot” water.
Ephydrid flies specialize on eating the bacterial and algal mats in the hot pools, although they too (especially their eggs) must be heat tolerant. These consumers in turn attract a variety of predators, like spiders and dragonflies, who must be mobile to escape sudden spurts of boiling water.
Or how about this one — what do you see in this accumulation of bacterial growth at the edge of the hot water?