The Environmental Sample Processor (ESP) is an autonomous biological sensor that extracts microbial DNA and measures gene abundances at sea. A month-long deployment of the ESP is underway to investigate the bacterial genes that drive volatile sulfur release from the ocean surface. A UGA Marine Sciences team (including Ph.D. student Brent Nowinski, shown here) is collaborating with scientists at the Monterey Bay Aquarium Research Institute and the University of South Alabama in this NSF-funded study.