A Clam, as seen in New Super Mario Bros. Wii.
|Debut Appearance||New Super Mario Bros. Wii|
|Latest Appearance||Mario Kart 7|
 New Super Mario Bros. Wii
They first appeared in New Super Mario Bros. Wii. They appear in World 1-4 and in 4-1. If a character gets to close to them, the character will get trap in the shell and if it closes, then it will take damage before they open back up. Most of them will have Coins inside of their mouths to try and lure a character close to them.
 Mario Kart 7
They would appear in Cheep-Cheep Lagoon in Mario Kart 7. They would act as obstacles when the racers are underwater. Much like their appearance in New Super Mario Bros. Wii they will have Coins and Item Boxes that the racers can pick up while being care to not be trapped by the Clampy's valves. They would appear in the shortcut for Daisy Cruiser.