It definately didnt molt. Unless every one Ive thrown in all molt then disappear. The octo leaves behind just the shell when its done. I mis-typed as well earlier. It doesnt have 8-10 arms, but 8-10" arms...my bad.
He cannot get enought of the crawfish now though. He jets on over and parachutes on them every time now.
Something that's surprised me recently. I had fiddler crabs in the tank for Ollie, and I removed all I could find after she passed away. But a few escaped me. Today I saw one - I had been told they could live only 2 weeks in full salt water, but this one has survived for more than 4 weeks. The only change seems to be that he's a bit more shy.