I got ahold of a small (grape sized) bimac octopus last thursday, and had him in a 15G tall holding tank. The tank was only 1/3 full in hopes of making it more work than it would be worth to escape until I could get the lid all sealed up on it properly. Unfortunately the little guy didn't like something about the tank, and the following day I went through the tank to make sure he was doing ok before I sealed the top and noticed he was gone. I'm so used to the cuttlefish being content in their glass house I didn't think the octo would try to escape in less than 24 hours. I was reading a couple 'urban myths' about octos in pet stores escaping their tank, crawling over to another tank to get some food, then either making that their new home or going back to their own tank. Is that at all likely? The octo tank is located in a garage filled with a dozen other aquariums (almost all saltwater), and a few having their sumps on the ground. Is there any likelihood that the little guy might have gotten out, crawled across the floor, and into the sumps of one of my other systems? I looked everywhere I could and didn't find him curled up on the floor. I'm a little worried I'm going to walk into the fish room one day soon and all the fish in one of my tanks will be gone. I'm not as worried about the fish as I am my cuttles.