Lugworm is a small sea worm with a soft body. It is also called lobworm or lugbait. Deep-sea fishing enthusiasts often use this worm for bait. Lugworms live along the Atlantic coasts of North America and Europe and around the Mediterranean Sea. They live underwater, in burrows dug into the sand. During low tide, the burrows may be exposed. The lugworm’s body is from 5 to 8 inches (13 to 20 centimeters) long, and it is made up of rings or segments. The front end of the body is thicker than the hind end and is covered with bristles. The lugworm breathes with 13 pairs of gills.