Hi everyone! I got my octopus last Thursday (Marinedepot says he is O. Bimaculatus). He seemed to be doing very well. The first couple of days, he came out several times just to watch us and when we offered him some shrimp on a stick he was very curious about it and even touched it (but he didn't eat it). But now he won't come out even when we offer him the shrimp. There are three hermit crabs in there now. I would have thought he would have eaten them by now. I am very tempted to move the rocks to see if he is OK. I checked around the tank to see if he had escaped. I have the lights off because I thought maybe he would feel more comfortable and I don't let my little siblings bug him. Did I do something wrong? Ammonia-0, Nitrite-0, Nitrate-0, Ph-8.3. I don't understand why all of the sudden he won't come out? Any suggestions for a very worried octo keeper?