Tardigrade are not extremophilic despite their extraordinary tenacity to survive.
Tardigrade . Tardigrades are one of the most resilient animals known : they can survive extreme conditions that would be rapidly fatal to nearly all other known life forms . They can withstand temperature ranges from 1 K ( close to absolute zero ) to about 420 K for several minutes , pressures about six times greater than those found in the deepest ocean trenches , ionizing radiation at doses hundreds of times higher than the lethal dose for a human , and the vacuum of outer space . They are not considered extremophilic because they are not adapted to exploit these conditions . This means that their chances of dying increase the longer they are exposed to the extreme environments , whereas true extremophiles thrive in a physically or geochemically extreme environment that would harm most other organisms .