Figure 15-7 Hyperthermophiles (a) These microscopic thermophiles (heat-loving organisms) live in water that is between 80°C and 100°C (176°F–212°F). (b) Tube worms (light-green tubes) with hemoglobin-rich red plumes. They reside around black smokers—vents in the ocean bottom that are in the same temperature range as the hot springs shown in (a). These vents are more than 3 km (2 mi) under water.