Malaclemys is a genus of semi-aquatic turtles in the family Emydidae, most notably represented by the diamondback terrapin (Malaclemys terrapin). These turtles are native to the brackish coastal estuaries, marshes, and tidal creeks of the Atlantic and Gulf coasts of the United States. Malaclemys species are easily recognized by their distinctive diamond-shaped patterns on the carapace, webbed feet adapted for swimming, and strong jaws designed for consuming a diet primarily composed of crustaceans, mollusks, and small aquatic invertebrates. They play a crucial role in their ecosystems by helping control invertebrate populations and maintaining the health of their habitats.