Fish and shellfish are two main categories of seafood enjoyed around the world. Fish are aquatic animals with gills, fins, and a streamlined body, such as salmon and tuna. They are rich in protein and omega-3 fatty acids, making them a healthy choice for many diets. Shellfish, on the other hand, include creatures like shrimp, crabs, and clams. They have a hard outer shell and are often considered a delicacy. Shellfish can be enjoyed in various dishes, from soups to pasta, and are also packed with nutrients, including vitamins and minerals. Both fish and shellfish offer delicious flavors and numerous health benefits.