Amoebas are plentiful in nature. They can strive in salt or freshwater, but are often
found in mud beneath the water than floating in the water itself. The common
amoeba species, Amoeba Proteus and other aerobic amoeba's are often
found attached to the underside of leaves of water plants such as of the
genus Sphagnum (e.g. mosses). There are also about a dozen parasitic
amoeba species that live inside human beings and most animals and
are usually found in the digestive tract.