EstherKennedyPSPTesting Published April 8, 2015 at 500 × 333 in • Sitka Tribe of Alaska starts testing for paralytic shellfish poisoning (PSP) and other marine biotoxins Next → Esther Kennedy of the Sitka Tribe of Alaska Resource Protection Department samples water near the Starrigavan Recreation Area dock for marine biotoxins such as paralytic shellfish poisoning. (Photos by Emily Kwong, KCAW-Raven Radio)