-In the liquid media (Z8) forming bright blue green films and clumps. = macrocolonies 

-Microcolonies without common mucilage (slime)

-Sheaths firm (colorless) 

-Cells of different shapes (rounded, irrigular, result from multiple fission), blue-green, 4-7 um in diameter 

-Baeocytes rounded, in groups of 6, 3 - 3.5 um in diameter

-cytoplasm irrigular before baeocytes production