Abstract
Bacteria living in the deep-sea have several unusual characteristic that allow them to growth in their extreme environment. The only deep-sea piezophilic bacterial species of two of these genera were named Shewanella benthica and Colwellia hadaliensis prior to the reports by the JAMSTEC group. We have identified several novel piezophilic species within the γ-subgroup of the Proteobacteria according to phylogenetic classifications based on 16S ribosomal RNA sequence information. Numerous deep-sea piezophilic bacterial strains have been isolated and characterized in an effort to understand the interaction between the deep-sea environment and its microbial inhabitants. It has been understood that the temperature and pressure influence to growth is also different depending on the strain for piezophilic bacteria.
