Halophiles
Organisms that are able to tolerate very high concentrations of salt.
Thermoacidophiles
Organisms that can tolerate very high temperature, highly acidic environments.
Psychrophiles (Cyrophiles)
Organisms able to survive at extremely low temperatures.
Barophiles
Organisms that can withstand extreme pressures.
Xerophiles
Organisms that can survive in extremely dry enviroments.
Alkaliphiles
Organisms that can survive in extremely basic (alkaline) enviroments.
Endoliths
Organisms that can survive within the small pore spaces within rocks.