The Feather Duster Worm, Sabellidae, is a worm which typically lives on the ocean floor. This worm does not look like the convention Earthworm, or Bloodworm, and to live builds a tube out of sand, and bits of shell to live on. The Feather Duster Worm is named this because it looks like a feather duster, and crowned bristles are usually to hook onto a food source, and eat. The Feather Duster Worm contains a closed circulatory system with varying amounts of hearts and vessels depending on the size and species, but all of them contain at least one heart.