Tags: Archaea.
Thermococcus gammatolerans is an archaea extremophile and the most radiation resistant known organism.Discovered in 2003 in a submarine hydrothermal vent in the Guaymas Basin about 2000 meters deep off the coast of California Thermococcus gammatolerans thrives in temperatures between 55–95 °C with an optimum development at approximately 88 °C. The optimal growth pH is 6 favoring the presence of sulfur (S) which is reduced to hydrogen sulfide (H2S).