Oceanihabitans
Scientific classification
Domain:	Bacteria
Phylum:	Bacteroidota
Class:	Flavobacteriia
Order:	Flavobacteriales
Family:	Flavobacteriaceae
Genus:	Oceanihabitans
Species:	O. sediminis
Binomial name
Oceanihabitans sediminis Zhang et al. 2016

Oceanihabitans is a genus of marine bacterium in the family Flavobacteriaceae. It contains a single species, O. sediminis.^[1] It is aerobic, Gram-negative, rod-shaped, and motile by gliding. O. sediminis produces flexirubin pigments. It is positive for cytochrome c oxidase and catalase. O. sediminis can use glucose, mannose, maltose and adipic acid as sole carbon sources for chemoheterotrophic growth. It is a chemoorganotroph and is chemotaxonomically characterized by the presence of menaquinone 6 (MK-6). The type strain is S9-10^T.

O. sediminis is an aerobic microbe and is unable to grow under anaerobic or microaerophilic conditions. The major respiratory quinone is MK-6. It is cytochrome c oxidase and catalase positive.^[1] Oceanihabitans sediminis is capable of synthesizing a variety of hydrolytic enzymes including alkaline phosphatase, acid phosphatase, esterase lipase (C8), cysteine arylamidase, leucine arylamidase, valine arylamidase, naphthol-AS-Bi-phosphohydrolase, and chymotrypsin.^[1] A positive leucine arylamidase result indicates O. sediminis can hydrolyze proteins into oligopeptides or individual amino acids.^[2] The products of this reaction can serve as substrates for cell metabolism. A positive esterase lipase result indicates O. sediminis can break down emulsified mono-, di and triglycerides into glycerol and fatty acid residues.^[2]

Members of the family Flavobacteriaceae are distributed globally. However, the abundance and diversity increases south of the polar front.^[3] O. sediminis strain S9-10^T was isolated from a sediment sample in the northern Yellow Sea in China. The phosphatase activity of marine microorganisms plays a pivotal role in phosphorus and carbon biogeochemical cycles.^[4] Phosphatase-producing bacteria are capable of hydrolyzing specific dissolved organic phosphorus compounds. This supplies pools of phosphorus and carbon to heterotrophic and autotrophic microbes.^[4]

O. sediminis is closely related to the genera Bizionia, Olleya, Lacinutrix, Algibacter, Winogradskyella,and Gaetbulibacter. Its DNA G+C content was 34.2 mol% which is consistent with other genera in the family Flavobacteriaceae.^[1]  The predominant cellular fatty acids are iso-C_15:0 (21.1 %), iso- C_15:1G (16.3 %) and iso-C_17:0 3-OH (12.0 %). The polar lipids are phosphatidylethanolamine, aminophospholipid, aminoglycolipid, two unidentified amino-lipids, and five unidentified polar lipids.^{[citation needed]}