A "disgorger" is a basin which fills and empties with seawater according to the tides. The oysters are placed in lockers there before being marketed to finish their filtration work and get rid of all the small impurities such as mud or grains of sand.

The tide refers to the daily rising and falling movement of the oceans and seas. The phenomenon of ebb and flow of water takes place twice a day during a 12-hour cycle and is repeated ad infinitum.