what are the main types of algae that exist?
['Euglenophyta (Euglenoids)', 'Chrysophyta (Golden-brown algae and Diatoms)', 'Pyrrophyta (Fire algae)', 'Chlorophyta (Green algae)', 'Rhodophyta (Red algae)', 'Paeophyta (Brown algae)', 'Xanthophyta (Yellow-green algae)']