neuroscience - If a non-mammal is starved of oxygen for some time, how long would it take the animal's neurons to die?

Medically, recovery of brain function after 3 minutes of oxygen deprivation at body temperature is rare.

Further down here in 1 it indicates that at lower temperatures the time can be much longer. At 13C, the record is 80 minutes for people. Animals cooled to 0C have a record of recovery of three hours! Not sure how much like themselves they feel after that though...