I received my octopus from Live Aquaria yesterday. Brainiac unfortunately didn't survive my move...after thinking him dead several weeks prior due to an ammonia spike and absolutely no sign of him, I wasn't prepared when I found him alive after moving in one of my rocks. Brainiac was likely a dwarf, based on the identification @DWhatley made. I am wondering if this species is also a dwarf? I wasn't able to get any good pictures, but videoed it while introducing to the tank. I opted for the bag acclimation method this time as getting an octopus out of the bucket proved...troublesome, the last time I attempted doing so. The tentacles seem longer proportionally than those on Brainiac, which makes me think it may be a different species. Side question: I had a single wavemaker rated at 850gph going while I introduced it into the tank, and it seemed to be far too powerful for it. How much flow should I have in a 55 gallon tank if I want the octopus to be comfortable and swim around, and not be blown against a wall?