Octopus Den Initiative

How do octopuses use the artificial octopus dens near the Croatian island of Krk, and what can be studied with them? Film or photograph them during your next dive or snorkeling trip to contribute to octopus research!

What are the aims of the project?

The project investigates whether and to what extent wild octopuses adopt artificial octopus dens and which factors influence their choice. Additionally, it examines in which areas they are found, which types of seabed they prefer, and what behaviors they display there. A key objective is to analyze the octopuses' preferences for specific designs and locations of artificial dens. This not only helps to better understand their natural behavior but also promotes the development of new research methods for studying octopuses in the wild and supports the conservation of these intelligent animals. Moreover, the artificial dens provide a unique opportunity to explore the cognitive abilities of these fascinating marine creatures in greater detail.

How can you participate in research?

Divers and snorkelers can take part in the Citizen Science project 'Octopus Den Initiative' by visiting the artificial octopus dens near the island of Krk during their private dives or snorkeling trips (e.g., while on vacation) and observing and documenting what they see. Especially helpful are photos and videos of the artificial dens — whether they are occupied by octopuses or empty. Photos and videos of octopuses found outside the dens are also valuable. The collected photos and videos can easily be shared with us, for example, via email or through our social media channels (e.g., Facebook). Every observation helps us learn more about the behavior and distribution of octopuses in this area. All important information about how to participate, as well as guidelines, can be found on our website.

Pictures

• Octopus in the artificial octopus cave H1 Punat lighthouse Octopus in the artificial octopus cave H1 Punat lighthouse
• Diver at the artificial octopus cave H7 Sv. Marak Diver at the artificial octopus cave H7 Sv. Marak
• Map of the artificial octopus caves (as at 12 March 2025) Map of the artificial octopus caves (as at 12 March 2025)
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