As far a keeping goes what are the differences between Octopus Bimaculoides and Octopus Bimaculatus? Size? I see where Nancy says that the Bimaculoides make the best pet, why? My LFS had a wild caught octo that they said came from the caribean, it looked like what I read, was a veined octopus. It had a mantle that was approx. 2" long and the arms appeared to be approx. 8-10" long and they were webbed. It was very inquisitive, it seemed to follow me as I passed the tank several times, and I'd swear that it was trying to touch me. I wish I knew what it was. It looked like the photo of Nancy's "ollie", but I saw no ocelli. He was adorable. I am getting ready to setup a 40 gallon acylic tank for a Bimaculoides, I think. Is that too small? I have thought about the setup for quite some time. I plan to drill two 1" bulkheads through the back wall for feed to a wet/dry, and a 1/2" bulkhead for return from wet/dry. I have a seaclone skimmer for inside the sump. I plan to put the heater in the sump. I plan to cover all the holes on the top with acrylic, thumb-screwed down with nylon screws. I wish the tank was bigger though. I already have this 40 gallon, and I'm not currently using it.