Psychrophile\/Cryophile An organism capable of survival , growth or reproduction at temperatures of -15 ° C or lower for extended periods ; common in cold soils , permafrost , polar ice , cold ocean water , and in or under alpine snowpack Radioresistant Organisms resistant to high levels of ionizing radiation , most commonly ultraviolet radiation , but also including organisms capable of resisting nuclear radiation Thermophile An organism that can thrive at temperatures between 45-122 ° C Thermoacidophile Combination of thermophile and acidophile that prefer temperatures of 70-80 ° C and pH between 2 and 3 Xerophile An organism that can grow in extremely dry , desiccating conditions ; this type is exemplified by the soil microbes of the Atacama Desert
and Ralstonia metallidurans Oligotroph An organism capable of growth in nutritionally limited environments Osmophile An organism capable of growth in environments with a high sugar concentration Piezophile An organism that lives optimally at high hydrostatic pressure ; common in the deep terrestrial subsurface , as well as in oceanic trenches Polyextremophile An organism that qualifies as an extremophile under more than one category Psychrophile\/Cryophile An organism that grows better at temperatures of 15 ° C or lower ; common in cold soils , permafrost , polar ice , cold ocean water , and in or under alpine snowpack Radioresistant Organisms resistant to high levels of ionizing radiation , most commonly ultraviolet radiation , but also including organisms capable of resisting nuclear radiation Thermophile An organism that can thrive at temperatures between 60-80 ° C Thermoacidophile Combination of thermophile and acidophile that prefer temperatures of 70-80 ° C and pH between 2 and 3 Xerophile An organism that can grow in extremely dry , desiccating conditions ; this type is exemplified by the soil microbes of the Atacama Desert