Which kind of organism does not generally require oxygen or sunlight to survive

Anaerobic organisms, those which do not perform the standard 'cellular respiration' or 'photosynthesis', do not require oxygen, nor sunlight to survive. Instead, they survive off of glycolysis which is a process also carried out in aerobic respirators, but it is one that does not require oxygen or sunlight. You can do this by using lactate, sulfate or even alcohol instead of the usual oxygen.