Shellfish are aquatic animals that are commonly consumed as seafood. They are divided into two main groups: crustaceans, which include crabs, lobsters, and shrimp, and mollusks, which encompass clams, oysters, and scallops. These creatures are not only a vital part of marine ecosystems but also a significant source of protein for many cultures around the world. In addition to their culinary value, shellfish play an important role in the economy, supporting fisheries and aquaculture industries. They are often harvested from both wild and farmed sources, and their popularity continues to grow due to their unique flavors and nutritional benefits, including high levels of omega-3 fatty acids.