A fishmonger is someone who sells raw fish and seafood. Fishmongers can be wholesalers or retailers and are trained at selecting and purchasing, handling, gutting, boning, filleting, displaying, merchandising and selling their product. In some countries modern supermarkets are replacing fishmongers who operate in shops or fish markets.

A fishwife, fish-fag or fishlass is a woman who sells fish. She is typically the wife of a fisherman, selling her husband's catch, but other sources of fish have been used.