Cyanodictyon planctonicum is a cyanobacterial species that typically creates colonies consisting of interconnected polygonal cells arranged in a regular, net-like structure. Each cell is enclosed in a thin, gelatinous sheath, and they vary in shape from spherical to polygonal. These cyanobacteria are commonly found in freshwater habitats like lakes and ponds, where they contribute to ecosystem health through photosynthesis and nutrient cycling.