the hard, variously colored, calcareous skeleton secreted by certain marine polyps. 2. such skeletons collectively, forming reefs, islands, etc. 3. the solitary or colonial polyp that secretes this calcareous skeleton.
Ancient methanogens are the source of natural gas. Halophiles are bacteria that thrive in high salt concentrations such as those found in salt lakes or pools of sea water. Thermophiles are the heat-loving bacteria found near hydrothermal vents and hot springs.
Archaebacteria are organized into three phylums. They are found mainly found in extreme habitats where little else can survive. All Archaebacteria that are known are anerobic and obtain their energy from light. Methanogens: This type of bacteria produces methane.Many such species live in the intestines of animals.They provide essentail nutrients and help breakdown the food in the intestines.The bacteria get a source of energy in return.ethanogens: This type of bacteria produces methane. Many such species live in the intestines of animals. They provide essentail nutrients and help breakdown the food in the intestines. The bacteria get a source of energy in return.