Chloroflexus These green, flexible bacteria move by gliding. Actinopod This star-shaped protist gathers food using its projecting rays. Amoeba Amoeba are famous heterotrophs that surround their food with their bodies to eat. Microbial Animals Animals are generally studied in a branch of science called zoology. Since some animals are too small to be seen without the aid of a microscope, these animals are included in this Microbe Zoo.
All animals are heterotrophs.
Rotifer This tiny animal is smaller than many protists, yet is as complex as larger animals. Hydra are tiny animals, most of which are microscopic. Many hydra live together with algae in a symbiosis. Some microbes breathe sulfate instead of oxygen. These bacteria, called sulfate reducers, thrive in sediments, such as those found at the bottom of a pond.