British conchology, or, An account of the Mollusca which now inhabit the British Isles and the surrounding seas
London :John Van Voorst,1862-1869.
biodiversitylibrary.org/page/24429566
Description: Deutsch: Gewöhnlicher Krake in Sea Life München English: Photo of a water animal in sea life Munich. Date: 31 December 2017, 16:27:48. Source: Own work. Author: MartinThoma.
Description: Deutsch: Gewöhnlicher Krake in Sea Life München English: Photo of a water animal in sea life Munich. Date: 31 December 2017, 16:24:11. Source: Own work. Author: MartinThoma.
Description: Nederlands: octopus vulgaris. Date: 8 August 2007 (original upload date). Source: Own work. Author: Albert Kok at Dutch Wikipedia (Original text: albert kok). Permission(Reusing this file): publiek domein.
Description: English: Exhibit in the National Museum of Nature and Science, Tokyo, Japan. Photography was permitted in the museum without restriction. Date: 5 September 2013, 00:28:20. Source: Own work. Author: Daderot.
Description: Deutsch: Gewöhnlicher Krake in Sea Life München English: Photo of a water animal in sea life Munich. Date: 31 December 2017, 16:27:30. Source: Own work. Author: MartinThoma.
Description: Deutsch: Gewöhnlicher Krake in Sea Life München English: Photo of a water animal in sea life Munich. Date: 31 December 2017, 16:27:44. Source: Own work. Author: MartinThoma.
Description: Juvenile octopus (presumably O. vulgaris). Date: Summer 2007 date QS:P,+2007-00-00T00:00:00Z/9,P4241,Q40720564. Source: Own work. Author: Bart Braun. Permission(Reusing this file): I hereby release this picture in the public domain. You are complete free to use, modify and redistribute it. I would appreciate it if you let me know, though.
Description: Deutsch: Gewöhnlicher Krake in Sea Life München English: Photo of a water animal in sea life Munich. Date: 31 December 2017, 16:27:26. Source: Own work. Author: MartinThoma.
Description: English: Aquarium of Lyon in France - A female octopus taking care of her eggs Français : Aquarium de Lyon en France - une femelle pieuvre protégeant ses oeufs. Date: 10 March 2007. Source: Own work. Author: Aurelie Chaumat.