UPDATE- DECEMBER 1 2009 Nelly is still going strong (about 8 months old now). She and the Eel are still "best friends". The Baboo was removed from the tank as it became aggressive. The Cuttle and Nelly never bothered each other. The Cuttle died a few months ago after laying eggs for over 2 months continuously. Just added a new baby cuttle to the tank 2 weeks ago. So far so good. I guess Nelly is now getting old, but she still seems to be going strong (and is very very active all day) P.S. I have never covered my tank at all and Nelly has never tried to escape. Its been 8 months. ---------------------------------- Hi All, I have an 600 Litres tank that I started about 8 months ago. I have an Octo (Octopus aculeatus I think), Cuttle, Ribbon Eel, Snowflake Moray, Large and Small fish and a Bamboo Shark. I just wanted to share my experiences with everyone. I got Octo Nelly (my son named her) about a month ago. She has been incredibly friendly and social. She seems to like hanging out (sleeping) with the Ribbon Eel which I found quite strange. She has started feeding by hand a few days ago and I am able to touch her now. I also have (had) two Cuttles. One died a week ago (and then Nelly ate him) and the other just laid about 20 eggs (big surprise). I guess I bought adults and will have babies soon. The Snowflake Moray seems to do his own thing as does the shark. Most interestingly, my tank is not Octo proof (AT ALL). She seems to be perfectly happy not escaping. I put in about 20 shrimp a week and small fish to feed all. I am hand feeding the eels, Shark and Nelly. They also hunt the shrimp and fish I add. I am having some water quality issues, but that is another story. I just wanted to know if anyone else has a similar setup. I live in Hong Kong and have very easy access to most any species of fish, cephs, etc. I am quite new at this but have become very interested.