Atlantic, Irish Sea, North Sea, Italy (Naples), British Isles, Pacific coast of USA (Alaska), France (Banyuls), west coast of Sweden (Tjarno and Kristineberg)

Cinnamon red color sometimes a chocolate reddish-brown color. Dorsal white head edges with a half circular spot in the center. Has cephalic ridges, white lateral longitudinal stripes and complete white rings. Both a white median stripe on the dorsal surface bifurcates at the head tip enclosing a patch of the same color as the body easily distinguishes this species form Tubulanus superbus. The ventral surface is pale compared to the dorsal. All but the first 2-3 white rings are more or less equidistantly spaced.

 Tubulanus annulatus is an unsegmented, elongated, flattened ribbon worm. It is strikingly coloured, ranging from brick-red to brownish-red, marked with white longitudinal stripes and rings. This species reaches a length of 75 cm or more, usually 3-4 mm in width. Up to 50 transverse white rings may be present with three longitudinal white stripes (one mid-dorsal and two lateral). The mid-dorsal stripe extends on to the head and terminates at a transverse white band bordering the tip of the snout.The Phylum Nemertea comprises approximately 900 species of elongated, often flattened worms called ribbon worms. They range in length from a few millimetres to up to 30 m and are capable of extreme contraction and elongation. Nemerteans do not possess a distinct head. The classification of the Nemertea is based on internal morphology. Most are benthic marine animals but there are some deep water pelagic species.

Belgian Exclusive Economic Zone, European waters (ERMS scope), Irish Exclusive economic Zone, Mediterranean Sea, North Sea, Portuguese Exclusive Economic Zone, Spanish Exclusive Economic Zone, Swedish Exclusive Economic Zone, United Kingdom Exclusive Economic Zone, Wimereux

Up to 75cm in length and maximum width of 5mm

Depth range based on 14 specimens in 1 taxon.
Water temperature and chemistry ranges based on 2 samples.

Environmental ranges
  Depth range (m): 0 - 56.5
  Temperature range (°C): 11.768 - 12.270
  Nitrate (umol/L): 4.820 - 7.121
  Salinity (PPS): 35.334 - 35.343
  Oxygen (ml/l): 6.069 - 6.174
  Phosphate (umol/l): 0.373 - 0.439
  Silicate (umol/l): 2.489 - 2.643

Graphical representation

Depth range (m): 0 - 56.5

Temperature range (°C): 11.768 - 12.270

Nitrate (umol/L): 4.820 - 7.121

Salinity (PPS): 35.334 - 35.343

Oxygen (ml/l): 6.069 - 6.174

Phosphate (umol/l): 0.373 - 0.439

Silicate (umol/l): 2.489 - 2.643
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

intertidal under stones, on sand, mud or coralline ground; sublittoral among holdfasts of Laminaria to depths of about 12m in course tubes attached to old bivalve shells

 Tubulanus annulatus is found sublittorally on a wide variety of substrata at depths of up to 40 m or more. It secretes a silken mucous tube, which is often found covered with sediment particles. This species is sometimes found intertidally beneath stones, amongst Laminaria holdfasts or on sand or mud near low water level.