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pochiExtremobiosphere?
Extremobiosphere is a new term coined to express habitats and ecosystems that survive under extreme conditions. Darkness, high and low temperature extremes, high pressures, low food or oxygen concentrations - these are all examples of extreme conditions that can be faced by marine organisms.

Extremophiles?
An extremophile is an organism which thrives under "extreme" environments; the term frequently refers to microorganisms. Extremophiles often require the extreme condition for growth. However, for the organism itself its environment is completely normal.

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