Scales and otoliths were collected from 304 specimens of the Antarctic fish Notothenia gibberifrons. When interpreted separately, only 25% if scale and otolith readings agreed. When a scale and otolith from a single specimen were interpreted simultaneously, 75% of readings agreed. 60% of scale readings and 30% of otolith readings changed between separate and simultaneous interpretations. Estimates of age tend to be lower when made from scales. Predictions of yield per recruit utilising age data derived from scales are approximately 30% greater than predictions utilising age data derived from otoliths.