Hello again! I have a new A. aculeatus (6" mantle and legs) and it arrived May 11th. It is diurnal, and came out twice a day at least. Fed live, and dead fiddlers, and a chunk of raw shrimp, almost every day. Then, four days ago, it did not come out. It has not come out since, at least any time I was watching. I made the mistake of putting a 3 stripe damsel in there because it was being naughty in the big tank, chasing new fish. I noticed it was a pest to the octo, but neither seemed particularly traumatized, just annoyed. I took the damsel out two days ago, and still no octo. Today, I dangled a dead crab in front of his den(a hole inside a rock), and as it hung in the opening, a tentacle slowly took it in. What do you make of this behavior? I moved the rock, by turning it so the opening is toward the front, so I wouldn't have to be a contortionist to see it.