What is a Stellate Amoeba?? A stellate amoeba is the star shaped protozoan. What are Protozoa good for? They are the nutrient cyclers in the soil food web along with flagellates, ciliates, nematodes and micro/macro arthopods. The stellate amoeba eats bacteria by surrounding it and engulfing them in gas bubbles. After eating the bacteria it releases the extra nitrogen that is not needed for their being. Making the nitrogen plant available in the form of ammonium. The nitrogen