Edited sentence: Adult size ranges from.Depending on the local substrate, the colour of the tube varies.Its common name is derived from the honeycomb-like pattern it creates when building its tube reefs.The honeycomb worm is a segmented worm that constructs tubes from cemented coarse sand and/or shell material, forming reefs.The thorax has three pairs of flattened chaetal sheaths, its chaetes form an operculum which is used to seal the tube opening.The tubes are arranged in close proximity and have a distinctive honeycomb-like appearance.These reefs range from  thick and take the form of hummocks, sheets or more massive formations