Microcystis is a colonial cyanobacteria commonly referred to as a slick or film due to its ability to form surface scums. Its buoyant cells accumulate along shorelines, particularly in windward areas, and are most frequently observed in nutrient-rich ponds during mid to late summer. Some Microcystis blooms produce toxins that can cause skin irritation and gastrointestinal distress upon contact or ingestion. To minimize health risks, it is advisable to avoid contact with affected water and implement nutrient management strategies to help prevent excessive bloom formation.