The comment was made that there's no such thing as hypoxic anemia. That is correct, the proper term is
anemic hypoxia. A lack of oxygen can't cause anemia, but anemia can cause a lack of oxygen.
The dictionary definition is below but essentially it is a lack of oxygen flow to the brain caused by a blood disorder (such as anemia) that restricts the blood's ability to carry oxygen.
anemic hypoxia
n. Hypoxia resulting from a decreased concentration of functional hemoglobin or a reduced number of erythrocytes. Also called anemic anoxia.