Aculeatus Mantle: about 1.5-2in Arms: 7-8in? (only got a quick look Acclimation time:1hr pH(shiping water): 7.5-7.6 Ok so I got another octo from live aquaria and noticed at once that this octo was much healthier! He was much bigger and was very calm and curious throughout acclimation. He wasn't breathing heavy and was not curling his arms like the last one. He actually popped up a couple times to the top to get a look at me! I fed him some thawed shrimp and could feel how strong he/she was!(later I discovered that he didn't really get to eat the shrimp because I soon moved him into my tank) I had a bit of trouble transferring him from the bag to the tank and in the end I had to coax him out with my hand. I didn't need to touch him because he seemed to get what was going on pretty fast and quickly got out. I never got to see the transition, I would look away for a second and then he would be a different color. I noticed the color changing for the first time! My last octo didn't ever change color, however this guy changed colors several times! In the bag he was a nondescript light brown, then he turned a dark brown/speckled white while in the early stages of transferring him, the a solid white ( danger color!! luckily it was only for a second) and then a solid dark brown when he finally got out of the bag. Anyway he is scoping out the hiding spots as we speak (also different from the other octo which went right to the top) with the light off. I have a pepperment shrimp in there if he gets hungry. Im pretty sure he's good and will be alive and well in the morning! I didn't get many pics, but I will when I can! He seems to be full grown, but he is changed colors very fast and frequently so I think he still has a little while. I read that octos don't change as much as they get old. Another note is that he seems very curious and went about exploring the new surroundings instead of hiding. I might have to take that into account when coming up with a name... Anyway one more to put on the list D!