Hua Jia, also known as Hua Clam, is a mollusk that lives on the bottom of shallow sea, while Clam is also a mollusk. It is a big classification, including Hua Jia, Meretrix meretrix, White Clam, Xi Shi Tongue and other varieties, and has the reputation of "the freshest in the world", so strictly speaking, Hua Jia can be called Clam, but Clam is.