''Hyphomicrobium aestuarii'' is a

Gram-negative Gram-negative bacteria are bacteria that, unlike gram-positive bacteria, do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. Their defining characteristic is that their cell envelope consists ...

bacteria from the genus of '' Hyphomicrobium''.

References

Hyphomicrobiales Bacteria described in 1989 {{Hyphomicrobiales-stub