nautilia abyssi nautilia abyssi nautilia abyssi is a thermophilic, sulfur-reducing and strictly anaerobic bacterium from the genus of nautilia which has been isolated from a hydrothermal chimney from the east pacific rise. nautilia abyssi scientific classification domain: bacteria phylum: campylobacterota class: "nautiliia" order: nautiliales family: nautiliaceae genus: nautilia species: n. abyssi binomial name nautilia abyssialain et al. 2009 type strain dsm 21157, jcm 15390, ph1209