Link to this article: http://journals.cambridge.org/abstract_S0003598X00099361 How to cite this article: E. Vika, V. Aravantinos and M.P. Richards (2009). Aristophanes and stable isotopes: a taste for freshwater sh in Stable isotopes in skeletons indicate changes in diet, and a sample of humans from Classical Thebes showed an unexpected increase in nitrogen values -usually associated with increased access to protein. But from what and how? After considering the possible sources of meat, milk and manure, the authors highlight the contribution of freshwater fish, and find support in Aristophanes -where the citizens are heard clamouring for the eels of Lake Kopais.