• Kingdom: Animalia
  • Phylum: Arthropoda
  • Subphylum: Crustacea
  • Class: Maxillopoda
  • Subclass: Thecostraca
  • Infraclass: Cirripedia
  • Superorder: Thoracica
  • Order: Sessilia
  • Family: Balanidae
  • Scientific name: Balanus crenatus
  • Norwegian: skipsrur


This is a sessile barnacle, easily recognized by the bright white color. The diameter rarely exceeds 2 cm and the height 4 cm. The shape is conical or almost cylindrical in crowded populations. The barnacle is unable to close the lids (carina) entirely, due to the slightly concave profile towards the tip.


It thrives on hard surface from the subtidal zone to a depths of a hundred meters.


B. crenatus is distributed over the entire northern hemisphere.