Flavobacterium flevense

Flavobacterium flevense is a freshwater agar-degrading bacterium in the order Flavobacteriales.^[1] It is a gram-negative bacterium capable of surviving extreme cold temperatures (psychrophilic).

Flavobacterium flevense
Scientific classification
Domain:	Bacteria
Kingdom:	Pseudomonadati
Phylum:	Bacteroidota
Class:	Flavobacteriia
Order:	Flavobacteriales
Family:	Flavobacteriaceae
Genus:	Flavobacterium
Species:	F. flevense
Binomial name
Flavobacterium flevense (van der Meulen et al. 1974) Bernardet et al. 1996
Synonyms
Cytophaga flevensis

It was first isolated in IJsselmeer, an inland bay in the Netherlands that is believed to have gradually separated from the open North Sea.^[2] It does not produce flexirubin type pigments, making it an outlier in the non-marine Cytophaga-Flavobacteria species ^[2].Therefore, it is hypothesized that F. flevense was originally a marine organism without flexirubin pigment, that gradually adapted to freshwater conditions as the seawater was supplemented with freshwater.