General Information: Isolation: Deep-sea hydrothermal vent from Pacific; Temp: Thermophile; Temp: 90C; Habitat: Deep sea, Hydrothermal vent, Marine. Methanocaldococcus sp. FS406-22 was isolated from hydrothermal vent fluid from an undersea volcano in the northeast Pacific Ocean. This organism is able to fix nitrogen at temperatures of 92 degrees C.