Epulopiscium
Bacteria
Candidatus Epulopiscium is a genus of Gram-positive bacteria that have a symbiotic relationship with surgeonfish. These bacteria are known for their unusually large size, many ranging from 0.2 - 0.7 mm in length. Wikipedia
Scientific name: Epulopiscium
Class: Clostridia
Domain: Bacteria
Family: incertae sedis
Genus: "Candidatus Epulopiscium"; corrig. Montgomery and Pollak 1988
Order: Eubacteriales
Phylum: Bacillota