Hey all, I got a new octo a few Thursdays ago (the 18th) and at first I thought he was O. bocki, then I figured that was wrong. Next, I felt pretty confident I received O. mercatoris. Now I'm having doubts again. Today was the first day he came out for me in full view for an extended period of time. His colors look like O. mercatoris, but today I noticed him crawling along the substrate on two arms. So now I'm thinking I got lucky and got a young A. aculeatus. But still, not sure. Here are a few pictures from my phone (my digital camera is broken, I'm getting a new one). Also, his mantle is about an inch and a half and the arms are about 3ish inches a piece. Thanks for your help!