Colonial chlorophyte with ovoid or lemon-shaped cells, usually in groups of 2, 4 or 8, and enclosed in a large, inflated, remnant mother cell wall. Chloroplasts green, parietal, variable in shape.
Found in the plankton of nutrient-rich lakes and ponds. Sometimes abundant in sewage ponds, particularly during summer.
![[Oocystis] (sewage pond), X1000. Photo: Otago Regional Council & Manaaki Whenua Image](/assets/Tools-And-Resources/Identification/algae/oocystis1000__ScaleWidthWzEwMjRd.jpg)