There are at least five projects under this name.

1. Anoxia is a Rock project (Progressive, Alternative, Industrial) by Iranian artist, Kiarash Bakhtiari. https://www.instagram.com/aaanoxiaaa/

2. Anoxia is a brutal death metal band from Finland: https://www.facebook.com/anoxiafinland

3. Anoxia was a Brutal Death Metal band formed in 1995 in Warwick, Rhode Island. They released one album under Pathos Productions. The band split up in 2006.

4. Anoxia is Alternative/Female Vocal band from Baltimore: https://www.