Pectinariidae, or the trumpet worms or ice cream cone worms, are a family of marine polychaete worms that build tubes using grains of sand roughly resembling ice cream cones or trumpets. These structures can be up to 5 centimetres long. The ones I currently have available are between 1/2" to an inch long. The earliest pectinariid fossils are known from the Cretaceous. We've collected a few especially for those of you who like unique, this is it!