Taiwan's coastline is 1,600 kilometers long, with complex and varied geology. The West Coast is mainly sandy-bottomed, shallow, and with moderate gradients and broad tidal belts. So there is a rich variety of shellfish available.
台灣地區海岸線總共長達一千六百多公里，海岸線不僅綿長，而且底質富於變化：西海岸多為泥沙淺灘，潮間帶寬廣，海底平緩，可以吃到文蛤、竹蟶、牡蠣、西施舌等樣式眾多的貝類。