Desulfurococcaceae are anaerobic, sulfur respiring, extreme thermophiles. There are many microbes that thrive in these extreme conditions known as thermophiles. Both organisms are sulfur dependent, extreme marine thermophiles. The Hydrogenophilalia are obligate thermophiles and include heterotrophs and autotrophs. Potential and utilization of thermophiles and thermostable enzymes in biorefining. Microorganisms are divided into three temperature groups; cryophiles, mesophiles and thermophiles. They can be contrasted with thermophiles, which are organisms that thrive at unusually high temperatures. The third subgroup thermoacidophiles also called thermophiles, are organisms that live in acidic areas. The enzymes in thermophiles function at high temperatures. The "microbial pesticides" in compost may include thermophiles and mesophiles. "Nanoarchaeum" lacks the ability to metabolize hydrogen and sulfur for energy, as many thermophiles do. Most species are mesophilic, but some are moderate thermophiles. In taxonomy, Thermococcus is a genus of extreme thermophiles in the family the Thermococcaceae. Most thermophiles are found in the Yellowstone National Park. Thermophiles and hyperthermophiles thrive in high temperatures.