The Jason manipulator arm measures the temperature of a diffuse hydrothermal vent where iron mats are growing (colored orange) surrounded by shrimp and squat lobsters.

The Jason manipulator arm measures the temperature of a diffuse hydrothermal vent where iron mats are growing (colored orange) surrounded by shrimp and squat lobsters. Image courtesy of Submarine Ring of Fire 2014 - Ironman, NSF/NOAA, Jason, Copyright WHOI.

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