The trade of freshwater fish to the Middle Ages attempts to put very fresh fish on sale.

In Paris, for example, in halls and markets, the "regrattières" [1] spread out their fish in buckets they had in front of them, where the alive fish swam and preserved itself. These animals could come wholesalers conveying them in boats whose medium in the shape of tank (shops) were bored holes. Storage in shop was a good means to keep freshwater fish alive. Facilities of conservation of freshwater fish downtown, in spite of a flesh more fragile thus than fish of sea, made its trade possible.

One used small shops (like that on the photograph dated from the beginning of 20th century and which measures a little more than 2 meters length) at the time of fishing in attaching by a chain to bank or behind the boat. This means of storage which floated between two water allowed, amongst other things thus, of living fish to convey directly on the place of sale.