What is a "cockle"?

A cockle is a small bivalve mollusk that inhabits sandy or muddy coastal areas. They have rounded shells with distinctive ridges and a heart-shaped outline. Cockles are known for their ability to bury themselves in the sand or mud, using a muscular foot to dig and move. They are filter feeders, extracting nutrients from the water through their gills. Cockles are often found in large numbers, forming dense beds or colonies. They are harvested for both commercial and recreational purposes, with their meat being utilized in various culinary dishes. Cockles are valued for their sweet and briny flavor, and they are enjoyed in many coastal cuisines around the world.