Yzerfontein's beach has its own white mussel beds which are a couple of metres offshore in the surf.
To get some muscles one has to wade out into the surf, twist your foot down into the sand until you feel the edge of its oval shell.
Once you have located the mollusc you bend down and pull it out of the sand.
Often, however, while twisting your foot into the sand you end up standing on a crab and get a big fright as it scuttles away over your bare foot.