On 5/22/03, a water sample was collected by Fritz Reidel near Flag Harbor. The sample contained strong bloom concentrations of the Mahogany Tide organism Prorocentrum minimum at 66,000 cells/ml. A bloom concentration threshold is considered 3000 cells/ml for P. minimum. This area is located north of the mouth of Patuxent River where blooms of P. minimum have been identified since mid-May (see HAB News from May 21, 2003: "Mahogany Tide blooms in the lower Patuxent River and its tributaries at the end of May.")