Ark (clam) Shells
The Ark clam shells are numerous and one of the most common shells on the South Florida East and West coasts. On the beach where I live arks are the most common shell. The shell is usually thick with strong ribs and may be up to about 3" in size. Arks have a straight hinge which has numerous teeth. The common Ark shell types on S. Hutchinson Island beaches are the Incongruous Ark and Ponderous Ark as well as the well-known "Turkey Wing" and "Mossy Ark" types. The Turkey Wing has a brilliant striped lines and is shaped like a bird wing.