The phrase 'Past and Present' is used to indicate that the nomenclature and classification is not yet stabilized. With the adevent of 16S RNA sequencing, many organisms previously known as Photobacterium or belonging to another group have been shifted into or out of the Photobacterium genus.
Given below is a list of some Photobacterium species and a brief description of each.
- Ph. phosphoreum: (Some biochemical characteristics are given on the page of Genus Attributes) This species is probably the most heard-of. Unlike many species of Photobacterium, most strains of Ph. Phosphoreum require Methionine for growth. Since many studies of Photobacterium have been on this species, many things are known such as the inactivation of its luminescent system at 34 C and can be inhibited by pressures upwards of 330 atm.
- Ph. leiognathi: (Some biochemical characteristics are given on the page of Genus Attributes) This species has been found in the light organs of leiognathid fishes (Ex: Ponyfish).
- Ph. angustum: (Some biochemical characteristics are given on the page of Genus Attributes) Has been found on the surface of the Turbot Fish.
- Ph. damsela: There are two subspecies - subspecies piscicida (the cause of fish Pasteurellosis) and subspecies damselae. Some suggest that there two subspecies are different enough to be separate species. Ph. damsela subsp. piscicida has been formerly known as Pasteurella piscicida.
- Ph. profundum: A relatively new find - this species was isolated from sediment of the Ryukya trench off of Japan. It is barophilic (can withstand high pressures).
- Ph. iliopiscarius: Formerly known as Vibrio iliopiscarius.It has been found in the intestines of fish.
- Ph. histaminum: A very new species (1994) discovered to be able to produce histamine