This sturdy, oval-shaped shell is a Spiny Cockle (Acanthocardia Aculeata). It typically measures between 5 and 11.5 cm in length. The shell has up to 22 raised ribs that run from the center to the edges, each with sharp spines along the middle. Concentric rings can also be seen between the ribs. The shell has a heart-shaped profile with a scalloped edge, and the inside is smooth and white with grooves running through the valves.

This species is found in the Mediterranean Sea and the Northeast Atlantic, living in muddy sand. Acanthocardia Aculeata feeds on phytoplankton, filtering its food from the water.