Pyrococcus horikoshii

Pyrococcus horikoshii is a hyperthermophilic, anaerobic archaeon, first isolated from hydrothermal fluid samples obtained at the Okinawa Trough vents at a depth of 1,395 metres (4,577 ft). It is obligately heterotrophic, cells are irregular cocci with a tuft of flagella, growing optimally at 98 °C, sulphur greatly enhancing its growth.^[1]

Pyrococcus horikoshii
Scientific classification
Domain:	Archaea
Kingdom:	Methanobacteriati
Phylum:	Methanobacteriota
Class:	Thermococci
Order:	Thermococcales
Family:	Thermococcaceae
Genus:	Pyrococcus
Species:	P. horikoshii
Binomial name
Pyrococcus horikoshii Erauso et al. 1993