![During ROPOS Dive R1729, a digital-still camera (left), a mass spectrometer (middle) and a fluid- and microbial-DNA sampler (right) were installed in the International District Hydrothermal Field at the vent called El Gordo. A titanium "hat" rests on top of the structure in a tubeworm and limpet patch. Inside the "hat" are temperature probes and intake nozzles for the fluid and DNA sampler. Photo credit: NSF-OOI/UW/CSSF; Dive R1729; V14.](https://s3.us-west-2.amazonaws.com/media.ooica.net/wp-content/uploads/2019/04/26204014/rs_pps.massspec.r1729_00493.sm_-1024x681.jpg)
During ROPOS Dive R1729, a digital-still camera (left), a mass spectrometer (middle) and a fluid- and microbial-DNA sampler (right) were installed in the International District Hydrothermal Field at the vent called El Gordo. A titanium "hat" rests on top of the structure in a tubeworm and limpet patch. Inside the "hat" are temperature probes and intake nozzles for the fluid and DNA sampler. Photo credit: NSF-OOI/UW/CSSF; Dive R1729; V14.
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