太平洋潜泥蛤（学名：Panopea generosa，英语：Geoduck），俗名象拔蚌，又名皇帝蚌、女神蛤，是一种可食用蛤蜊，象拔蚌的壳一般长15-20厘米，但是其虹管可长达一米，形似象鼻，又大又多肉，因此被称为「象拔蚌」。原产地在北美洲西海岸北太平洋沿海，当由尤以华盛顿州及温哥华海岸盛产。

象拔蚌在蛤蜊中体积是相当大的，成年期之后其天敌很少，因此也是自然界的长寿物种。象拔蚌为一种受华人及日本人崇尚食用的高级海鲜。过往由于北美当地人并不吃象拔蚌，当地的象拔蚌生长状况良好。但自从亚洲移民开始捕食，当地的象拔蚌开始濒临绝种。象拔蚌从1970年代开始商业捕捞，在亚洲食品市场很受欢迎，野生数量快速下降。现在已有很多来自人工养殖。人工养殖过程是否会破坏环境还有待观察。

The Pacific geoduck (/ˈɡuːiːdʌk/ "gooey duck"), scientific name Panopea generosa, is a species of very large, edible saltwater clam in the family Hiatellidae. The common name is derived from a Lushootseed (Nisqually) word gʷídəq.

The geoduck is native to the west coast of North America. The shell of the clam ranges from 15 centimetres (5.9 in) to over 20 centimetres (7.9 in) in length, but the extremely long siphons make the clam itself much longer than this: the "neck" or siphons alone can be 1 metre (3.3 ft) in length. The geoduck is the largest burrowing clam in the world. It is also one of the longest-living animals of any type, with a lifespan of up to 140 years; the oldest has been recorded at 168 years old.