Click on the "groups" below for introductory information and pictures.

• BACILLARIOPHYTA (diatoms)
• CHAROPHYTA (stoneworts)
• CHLOROPHYTA (green algae)
• CHRYSOPHYTA (golden algae)
• CYANOBACTERIA (blue-green algae)
• DINOPHYTA (dinoflagellates)
• PHAEOPHYTA (brown algae)
• RHODOPHYTA (red algae)