Mussels are a type of shellfish found in both freshwater and saltwater. They have a dark, oval-shaped shell that can be blue, black, or brown. Mussels live in clusters, often attached to rocks or other surfaces using strong threads. They are filter feeders, meaning they eat tiny particles from the water, which helps keep the environment clean. These tasty seafood delicacies are popular in many cuisines around the world. People often enjoy them steamed with garlic and herbs or in a flavorful broth. Mussels are not only delicious but also packed with nutrients, making them a healthy choice for meals.