What depth do shellfish generally live in?

The depth at which shellfish live varies greatly depending on the specific species. Some shellfish, such as mussels and barnacles, live in the intertidal zone, which is the area of the shore that is alternately covered and uncovered by the tides. Other shellfish, such as scallops and clams, live in shallow waters, typically from a few meters to tens of meters in depth. Some shellfish, such as deep-sea shrimp and crabs, live in much deeper waters, sometimes thousands of meters down.