Editing Halophile (section)

== Classification ==
Halophiles are categorized by the extent of their [[halotolerance]]: slight, moderate, or extreme. Slight halophiles prefer 0.3 to 0.8 [[Molar concentration|M]] (1.7 to 4.8%—seawater is 0.6 M or 3.5%), moderate halophiles 0.8 to 3.4 M (4.7 to 20%), and extreme halophiles 3.4 to 5.1 M (20 to 30%) salt content.<ref name=Ollivier>{{cite journal | vauthors = Ollivier B, Caumette P, Garcia JL, Mah RA | date = March 1994 | title = Anaerobic bacteria from hypersaline environments | journal = Microbiological Reviews | volume = 58 | issue = 1 | pages = 27–38 | doi = 10.1128/MMBR.58.1.27-38.1994 | pmid = 8177169 | pmc = 372951 }}</ref>  Halophiles require [[sodium chloride]] (salt) for growth, in contrast to halotolerant organisms, which do not require salt but can grow under saline conditions.