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Shewanella violacea DSS12(S. violacea) is a gram-negative bacterium found within a marine sediment sample collected from the Ryukyo Trench at a depth of 5,110m. The first description of this organism was published in 1998 by Japanese microbiologists Yuichi Nogi, Chiaki Kato, and Koki Horikoshi (taxonomy of novel species paper) who named the species after its violet appearance when it is grown on Marine Agar 2216 Plates. (taxonomy of novel species paper). S. violacea is motile rod-shaped bacterium with flagella (BacMap). It is a facultative anaerobe and considered an extremophile due to its optimal growing conditions at 8ᵒC and 30MPa (BacMap and Kato). Researchers are evaluating this species to better understand the specific mechanisms S. violacea uses in order to thrive in its unusually cold and high pressure environment.