A razor shell is a type of bivalve mollusk that has a long, thin, and sharp shell. It is also known as a razor clam, razor fish, or spoot. These names come from the shell's resemblance to a straight razor, and its ability to slice through the sand and sediment with ease. In some regions, razor shells are also called Atlantic jackknife clams, Pacific razor clams, or razor cockles. Razor shells are prized for their edible meat and are commonly used in seafood dishes such as chowders, stews, and ceviche. They are found in coastal waters around the world, and are a popular food source for many marine animals, including humans.