Acanthocardia tuberculata - Linnaeus, 1758
Globular form with heart-shaped profile, radial ribs with tubercles more or less pronounced, surface decorated with various colored bands. Sculpture of 18-20 bold ribs and fine concentric grooves and ridges. Two cardinal teeth in each valve,  two anterior and one posterior lateral teeth  in the right valve, the left valve presents a single anterior and posterior laterals. It lives on sand, mud or gravel bottoms from the intertidal zone to depth of 100 meters;  the average life span is from 4 to 7 years . The maximum life span is  estimated to be  around 11/12  years.  Its mean and maximum size differs significantly between locations and populations; If you are interested about size and growth of A. tuberculata, read or download the study available on the "Science" page of this site.