ANOMALOUS AMPLITUDES IN A THERMAL BATH

I review the implications of the axial anomaly in a thermal bath. I as sume that the Adler-Bardeen theorem applies at nonzero temperature, so that the divergence of the axial current remains independent of tempe rature. Nevertheless, I argue that while the anomaly does not change w ith temperature, ''anomalous'' mesonic couplings do. This is verified by explicit calculations in a low temperature expansion, and near the chiral phase transition.