Sulys is building DNA-powered disease surveillance for salmonid farms, turning farm water into an early-warning signal for fish health. Low-cost passive samplers placed across a site collect pathogen DNA and RNA, and a portable on-site test returns results without sample shipping or lab turnaround, showing producers where a threat is emerging. By feeding that signal into predictive risk models, Sulys helps producers act before disease takes hold rather than after fish show symptoms.