Fermented fish products fulfilled multiple functions in Graeco-Roman society. They were a source of nutrition, a medicine with both dietetic and therapeutic value, and a commodity of trade. Their production and commerce provided employment, even wealth, for many individuals in the western and eastern provinces of the Roman Empire. The work defines ancient salt-fish products and clarifies their relationship with modern counterparts. Following discussion of the perceived and actual utility of these products in human and veterinary medicine, the author, employing literary, archaeological,...