THE BUREAU of Fisheries and Aquatic Resources (BFAR) declared the area of Irong-Irong Bay in Western Samar officially free from red tide contamination. In its 21st shellfish bulletin for the year, BFAR said red tide warnings are still in effect in the areas of Milagros, Masbate; Sorsogon Bay, Sorsogon; Dauis and Tagbilaran City, Bohol; Matarinao Bay, Eastern Samar; and Dumanquillas Bay, Zamboanga del Sur. In Mindanao, areas with active red tide warnings include Murcielagos Bay, Zamboanga del Norte; Murcielagos Bay (Sapang Dalaga and Baliangao), Misamis Occidental; Balite Bay, Davao Oriental; and Lianga Bay, Surigao del Sur. All types of shellfish and Acetes sp. or alamang harvested in areas with red tide warnings are unsafe for human consumption. Other marine species coming from the same areas can still be eaten with proper handling. Red tide is a result of high concentrations of algae in the water. Human consumption of contaminated shellfish may result in paralytic shellfish poisoning, which affects the nervous system. Usual symptoms of paralytic shellfish poisoning are headaches, dizziness, and nausea. Severe cases may cause muscular paralysis and respiratory problems. — Revin Mikhael D. Ochave