Surrounded by sea, Spain offers an opportunity to taste a wide variety of creatures from the ocean. Sometimes even what was once used, and still is used, as bait years later becomes a delicacy.
These fish are long, thin molluscs with shells that look like the old cut-throat razors and are sometimes aso known as razor clams. They swim vertically, in sychronised groups, with their long snouts pointing down.
Sometimes they are harvested by hand or trailing an electric cable behind a boat to struck the fish.