Bacteria that don't need oxygen to live are called what?

Anaerobes are the classification of bacteria that can
survive without oxygen.  These organisms are able to go through metabolic processes with
very little or no oxygen and some will even die in the presence of oxygen.  Anaerobes
can be classified as facultative anaerobes which are able to survive with or without
oxygen obligate anaerobes which require environments without
oxygen.

Aerobes are bacteria that require oxygen for
survival. They cannot undergo metabolic processes without
oxygen.

Facultative anaerobes are well adapted and able to
survive in a variety of environments whereas the obligate anaerobes and aerobic bacteria
are limited in the types of environments that they can survive
in.