I depend heavily on the following literature while developing www.seawater.no:

  1. Frank Emil Moen & Erling Svensen (2004): "Marine Fish & Invertebrates of Northern Europe"
  2. P. J. Hayward & J. S. Ryland (2003): "Handbook of the Marine Fauna of North-West Europe"
  3. Paul F. S. Cornelius (1995): "North-West European Thecate Hydroids and their Medusae, part 1."
  4. Paul F. S. Cornelius (1995): "North-West European Thecate Hydroids and their Medusae, part 2."
  5. Bernard E. Picton (1993): "A Field Guide to the Shallow-water Echinoderms of the British Isles."
  6. Dansk naturhistorisk forening (1907-2004) "Danmarks Fauna, bind 1-88"