''Marinococcus halophilus'' is a

Gram-positive In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram-positive bac ...

and

halophilic The halophiles, named after the Greek word for "salt-loving", are extremophiles that thrive in high salt concentrations. While most halophiles are classified into the domain Archaea, there are also bacterial halophiles and some eukaryotic species, ...

bacterium from the genus of ''

Marinococcus ''Marinococcus'' is a Gram-positive, strictly aerobic, chemolithoautotrophic and non-spore-forming genus of bacteria from the family of Bacillaceae The Bacillaceae are a family of gram-positive, heterotrophic, rod-shaped bacteria that ma ...

'' which has been isolated from a salted

mackerel Mackerel is a common name applied to a number of different species of pelagic fish, mostly from the family Scombridae. They are found in both temperate and tropical seas, mostly living along the coast or offshore in the oceanic environment. ...

. ''Marinococcus halophilus'' produces ectoine.

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Further reading