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Croatia - Octopus
The group of octopuses can be subdivided in three groups. Sepia’s, which swim freely but are living close to the at the bottom. In springtime sepia’s are commonly seen at the Dutch coasts. Octopuses (eight arms), who live most of the time at the bottom of the sea, are rarely seen in the Netherlands. Squid live mainly in the open waters (pelagic layer). In springtime they are commonly seen in Dutch waters when they are mating. Octopuses can produce ink which they use for protection. Furthermore, their skin contains pigment cells which enable the octopuses to change their color very quickly. This camouflage technique makes them almost invisible for predators.

Common European squid
Allotheuthis spec./Loligo spec. (Lamarck, 1798)

Octopus vulgaris
Octopus vulgaris (Cuvier, 1797)