Review of the analysis and interpretation of otolith chemistry studies in WA against defined objectives/hypotheses. Current understanding indicates that previous experimental design and analysis for otolith chemistry studies in WA cannot discriminate stocks, and particularly not without consideration of other information. As such the conclusions in some of these papers are not only outdated but are incorrect and hence misleading. It remains to be seen whether retrospective assignment analyses might provide estimates of, or insight in to, mixing rates for some of the marine index species in WA for which otolith chemistry methods have been applied.