👉 Gwynioidea is a group of marine gastropod mollusks, commonly known as clamfish or gynoid clams. These creatures are characterized by their large, round heads, which they use for feeding and hunting. The shells of these animals are covered in fine scales that form the outline of the animal's body. Gwynioidea is a diverse group with over 20 species, including some of the most popular seafood dishes like clams and oysters.