• Kingdom: Animalia
  • Phylum: Echinodermata
  • Subphylum: Echinozoa
  • Class: Echinoidea
  • Order: Camarodonta
  • Family: Parechinidae
  • Scientific name: Strongylocentrotus droebachiensis
  • Norwegian: drøbakkråkebolle


This medium sized,  regular sea urchin, may reach a diameter of 8 cm. The profile is somewhat flattened. The shell and spine color is usually green, often with a violet, reddish or brown tint. The primary and secondary spines are of approximately the same lengths.


It can be found on any depth from the sub-tidal zone and down to 1200 meters.


It is widespread over most parts of the northern hemisphere.