Microcystis wesenbergii is a type of cyanobacteria characterized by spherical cells that cluster together to form colonies. These colonies vary in size and shape, often appearing as irregular clusters or mats on the surface of freshwater bodies. Each cell is relatively small, typically ranging from 3 to 8 micrometers in diameter, and is surrounded by a mucilaginous sheath that contributes to the colony’s cohesion and slimy texture. Found commonly in freshwater habitats such as lakes, ponds, and slow-moving rivers, Microcystis wesenbergii has the ability to rapidly multiply under favorable conditions, leading to the formation of blooms. While crucial to aquatic ecosystems, this species can produce toxins harmful to other organisms and may pose health risks to humans during bloom occurrences.