Archaebacteria

Archaebacteria was, until recently, a kingdom of Domain Bacteria. Recent discoveries have been made it was decided that the organisms of Archaebacteria were too diverse and became Domain Archaea. The characteristics of Archaebacteria are: living in extreme environments where other bacteria are not found, such as in sulfur-rich environments, or in boiling water. Digestion is extracellular but not gastrovascular because they excrete enzymes to break down their food. Examples of Archaebacteria are halophiles, methanogens, and thermophiles.

Archaebacteria tend to live in extreme environments, such as this vent in this picture.