Subject to rough tides, winds, changing sea temperatures and other natural hazards, salt water cultivation of the sea mussel (tinctata woodiana) is far riskier than fresh water farming.
澎湖四面環海，海岸線曲折；海水清澄，潮間帶（海底暖流匯集處）廣闊；當地又盛產養殖黑真珠最好的材料﹘ ﹘黑蝶貝，發展淺海養珠條件極佳。