Any of several bivalve marine mollusks of the genus Pinctada and related genera of tropical waters, especially P. margaritifera, a major commercial source of pearls.

• 珍珠贝，莺蛤：一种莺蛤属和有关热带水域属的双壳海生软体动物，尤指珠母贝属，为珍珠的主要商业来源