海螺是一种贝类软件动物，专指生活在海上的螺。海螺跟螺和蜗牛共同组成了腹足纲。

Whelk is a common name that is applied to various kinds of sea snail, many of which have historically been used, or are still used, by humans and other animals for food.

Although a number of whelks are relatively large and are in the family Buccinidae (the true whelks), the word whelk is also applied to some other marine gastropod mollusc species within several families of sea snails that are not very closely related.