Motile unicell 2 apical flagella, sheathed by that plasma membrane that is extruded from the cell wall. Single large chloroplast with one or more pyrenoids and starech granules. An "eyespot" region within the chloroplast at the anterior end allows the organism to seek out areas of appropriate light intensity. 2 or more contractile vacuoles at the anterior end of the cell function to remove excess water and waste products.

Chlamydomonas