Abstract: A tank for the depuration of shellfish incorporating an elongated open vessel for retaining sea water and a manifold extending the length of the bottom of the vessel substantially along the longitudinal center axis from one end of the vessel to the other and including a connection at each end thereof for the injection of sea water with a plurality of fill pipes extending from the manifold toward each side of the vessel and each fill pipe including a pattern of holes for the emission of sea water therefrom forming an up-welling pattern to provide a desired turbulence within the vessel and a trough extending around the upper periphery of the vessel for recovering sea water spilling over the upper walls of the vessel such that the injection of sea water through the holes and the recovery of the sea water in the troughs preventing dead spots within the sea water in the vessel.