泥螺（学名：Bullacta exarata）为阿地螺科泥螺属的动物，也叫“吐铁”。

卵圆形贝壳，薄而脆，壳口大，表面平滑；体肥略带黄色，不能全部缩入壳内，皮肤略透明；腹足两侧边缘各反折掩盖贝壳的一部分。

Bullacta exarata, common name the Korean mud snail, is a species of a sea snail or bubble snail, a marine gastropod mollusc in the family Haminoeidae, the bubble snails.

Bullacta exarata is a commercially important mollusc which is used as a food item in eastern China.