The Dinoflagellates 1. Unicellular, photosynthetic, mostly marine 2. Most have chlorophyll a and c along with carotinoids 3. Primary factor for high productivity of corals in nutrient poor water 4. Reproduce primary by longitudinal cell division a.
Sexual reproduction does occur b.
The Zoomastigotes 1. Unicellular, heterotrophic, highly variable in form 2. Possess one to thousands of flagella 3. Free-living and parasitic forms 4. Many reproduce only asexually, some reproduce sexually 5.