Interactions with other Species
Humans - We do not usually interact very much with wild Common Octopuses, or any other wild octopuses for that matter. We do however deal with octopus fisheries a lot. Octopus is a very common meal in Japan, Northwest Africa, and many Mediterranean countries. Occasionally you may see a person with a pet octopus and it would be safe to assume it is an Octopus vulgaris.
Food Chain - Octopus vulgaris is in the middle of the food chain. It feeds on smaller creatures such as crabs, lobsters, mussels, and other shell fish. The octopus is a common treat for sharks, whales, and sometimes bigger fish.
Other - Octopuses are solitary creatures. They live alone and only come in purposeful contact with one another in the spring during mating season.