Mussels are seen at Volle Gas restaurant in Brussels November 24, 2011. Mussels start as larva, until they are heavy enough to sink to the bottom of the sea, where they grow wiry threads -- known as beards -- that allow them to latch on to anything around, forming great clumps of dark and heavily encrusted shells. There in the deep, they feed heartily on plankton and grow plump. Marine mussels tend to live on exposed shores in intertidal waters and after two to three years are ready to be harvested. Zeeland, on the north coast of Belgium and the western Netherlands is a perfect place for the young molluscs to grow up and was long the source of most mussels in Belgium. Picture taken November 24, 2011.[Photo/Agencies]