I just read an article from the Philippine Daily Inquirer’s website about the imposition of Shellfish ban in Eastern Samar.
Apparently, the Bureau of Fisheries and Aquatic Resources (BFAR) prohibit gathering, eating, and selling shellfish from Matarinao Bay. It appears that toxic red tide organisms have been discovered in water samples collected the bay. According to the news, the bay covers the following areas: Salcedo, Quinapondan, MacArthur and Hernani.
If you are living within or near these places, try to practice due diligence by not consuming or selling shellfish; the article did not say anything about the effects of the red tide in other marine life within the area but it will be safer to abstain from seafood until the ban is lifted.
BFAR also made clear that other than Matarinao Bay, all other water bodies in the region are free from red tide organisms.