New England is expected to experience a ‘moderate’ regional ‘red tide’ this spring and summer, report NOAA-funded scientists working in the Gulf of Maine to study the toxic algae that causes the bloom. The algae in the water pose no direct threat to human beings, however the toxins they produce can accumulate in filter-feeding organisms such as mussels and clams – which can cause paralytic shellfish poisoning (PSP) in humans who consume them.
Under a newly developed rating system, a moderate bloom could cause the closure of shellfish beds along an estimated 126 – 250 miles of coastline.