The Family Terebellidae, commonly known as spaghetti worms, are marine polychaetes found in shallow to deep sea waters worldwide. They are characterized by a long, slender and thread-like body, with a large crown of branchiae or gills on the head. Other synonyms for the Terebellidae family include the sand worm, serpulid worm, and the bristle worm. These worms play an important role in marine ecosystems as sediment mixers, filters, and food sources for larger predators. Despite their unappealing name, spaghetti worms are fascinating creatures and contribute greatly to the diversity and complexity of marine life.