Paramecia are single-cell organisms that live in ponds, rivers, lakes, streams and puddles. Some paramecia survive inside the bodies of animals or in soft, moist soil.
Paramecia are microscopic organisms with short hair-like bristles that surround their cell. These celia propel paramecia rapidly around their environment. Individually, paramecia attach to the bottom of a pond or stream, but they swarm together when searching for a new home. They procreate by splitting in half, and they feed on dead plant and animal matter and bacteria. Some types of algae grow within paramecia and the union results in a symbiotic relationship of nutrient give and take. The natural predators of paramecia are mussels and water fleas.