For shellfish, water depth is one of the factors that determine whether they thrive at a location. Currents and salinity also play a role. An increase in water depth may therefore affect the occurrence of shellfish. Oysters can be found in water depths of up to 60 metres. N05-A is located in the German Bight, which is known as a dynamic environment with strong winds, tidal currents and waves up to six metres high. The dynamics of these three phenomena affect the movement of sand. The average water depth at N05-A is over 20 metres. A few centimetres will hardly make a difference in this dynamic environment. The effects of increasing water depth on shellfish are further investigated in the EIA.