SUBSTRATA MAIN PAGE|
TAXONOMY: Bacteria -> Terrabacteria group -> Firmicutes -> Bacilli -> Bacillales -> Bacillaceae -> Marinococcus
Gram-positive, spherical cells, 1.0–1.2 µm in diameter, occurring singly, in pairs, tetrads, or clumps. Motile. The motile cells usually have one or two flagella. Non-spore-forming. Colonies are circular and smooth and may be either orange, yellowish orange or creamy white. Moderately halophilic. Growth occurs in media with 5 to 20% NaCl. Optimum temperature for growth is 28–37 °C. Chemo-organotrophic. Metabolism respiratory. Strictly aerobic. Catalase-positive. Acid may or may not be produced from sugars. The cell wall contains peptidoglycan of meso-diaminopimelic acid type. The major menaquinone is MK-7. Found in sea water, solar salterns, and saline soils.
DNA G + C content (mol%): 43.9–48.5.
Type species: Marinococcus halophilus