The manipulator arm on the deep-sea vehicle Jason holds a samplng instrument above a community of tubeworms at a hydrothermal vent site called “Crab Spa” on the East Pacific Rise. The device, called an Isobaric Gas-Tight sampler, collects samples of fluids and microbes spewing from the vents. (Photo courtesy of Stefan Sievert, WHOI/NSF/ROVJason©2014 Woods Hole Oceanographic Institution)

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The manipulator arm on the deep-sea vehicle Jason holds a samplng instrument above a community of tubeworms at a hydrothermal vent site called "Crab Spa" on the East Pacific Rise. The device, called an Isobaric Gas-Tight sampler, collects samples of fluids and microbes spewing from the vents. (Photo courtesy of Stefan Sievert, WHOI/NSF/ROVJason©2014 Woods Hole Oceanographic Institution)