last weekend I was in a German public aquarium. they had an octo. the card said vulgaris, but I think it's another species. I took some pics, when they're developed, I'll post them to get your opinion. anyway this octo was kept together with a fish, Ctenolabrus rupestris. apparently this went well. they seemed to leave eachother alone. at least the hour and a half I spent in front of the tank. second part of the subject. in that particular octo tank they had a bubbler installed. The octo went over there every 10 to 15 minutes and hung above the bubbles. he seemed to like it a lot!!!!!!