Sperm whale
Neptunomonas japonica is a species of bacteria. It is Gram-negative, rod-shaped, non-spore-forming and motile by means of a single polar or subterminal flagellum. Its type strain is JAMM 0745T (=JCM 14595T=DSM 18939T). It was first found in carcasses of a Sperm whale and is closely related to a symbiotic bacterial clone of the polychaete "Osedax japonicus".