A marine algae bloom appears to be dissipating along most of Maine's coast, though cell counts remain elevated in isolated parts of Muscongus and Penobscot bays.
The Department of Marine Resources' Oct. 9 update says satellite imagery showed declining Karenia mikimotoi activity nearshore and offshore over the preceding week. Dissolved oxygen rebounded in affected nearshore areas, and few areas of impact were being reported or observed.
Dense patches are likely to kill softshell clams and marine worms through reduced oxygen and direct contact with the algae, the department said. Fish and lobsters that can move away are less at risk.
The department said this species does not negatively affect human health and fish and shellfish harvested from Maine waters remain safe to eat. Harvesting and sales remain subject to regulatory safety standards.