Colonies of hemispherical cells in pairs within mucilage. Cells are usually bright blue-green and never contain organelles (chloroplasts, nuclei). Mucilage surrounding the cells may contain faint layering.
Chroococcus, Lake Rotoiti, X640. Photo: Otago Regional Council & Manaaki WhenuaChroococcus, Lake Rotoiti, X1000. Photo: Phil Novis, Manaaki Whenua