👉 Clamshells are a type of marine shellfish that is commonly found in freshwater habitats. They are named after their distinctive, white, rounded shells that are often used as decorations on various items such as boats and clothing. In general, clams are large, carnivorous animals that feed on small crustaceans, mollusks, and other marine organisms. Some species of clams have been observed to live for over 100 years, while others can survive in environments with high