Organisms that especially like heat are called thermophilic and grow at temperatures between 40 and 70 °C. Some of them prefer it even hotter, they are called " hyperthermophilic ". In order to be able to withstand such hot temperatures, they have special protective mechanisms that protect their cell structures. They for example live near volcanoes or in hot springs in the deep sea.
Explanation for children:
Thermo means warmth in Greek, and philia means love. A living being is thermophilic, which means it likes heat if it likes temperatures between 40 and 70 °C, which is pretty hot! Some creatures like it even hotter. We would burn ourselves at such high temperatures, but thermophilic organisms have developed protective mechanisms to prevent this. They for example live near volcanoes or in hot springs.