SEQUIM, Wash. (Metro) -- Sequim Bay will remain closed to shellfish harvesting for now, due to the "red tide." The State Department of Heath (DOH) tells peninsuladailynews.com an elevated level of potentially deadly paralytic shellfish poison, or PSP, has been found in a water sample from the bay. Sequim Bay was already closed to recreational shellfish harvesting because of diarrhetic shellfish poisoning, or DSP. DSP is less serious, but can still cause illness. Copyright © 2012 Metro Networks Inc.