i just got my new octopus the other day, when i put him in the tank, he kindov flotted on the bottem for a few seconds, and then shot behind a rock, from then on, i couldent find him, untill today, my friend spotted him at the back of my tank, behind all of my live rock, burried in the sand. it was almost impossible to see him. hes not there anymore, no idea where he whent, its a 55 gallon with lots of live rock, i havent seen him out in the open since i first put him in, IS THIS NORMAL????