Cells containing membrane-bound organelles, such as chloroplasts and nuclei.
Cell lacking membrane-bound organelles; contents usually bright blue-green.
![[Botrydiopsis], X1000. Photo: Phil Novis, Manaaki Whenua](/assets/Tools-And-Resources/Identification/algae/botrydiopsis_phil1000__FillMaxWzMwMCwyMDBd.jpg)
![[Cyanothece], X1000. Photo: Phil Novis, Manaaki Whenua](/assets/Tools-And-Resources/Identification/algae/cyanothece_phil1000__FillMaxWzMwMCwyMDBd.jpg)