I got a new algae octopus, i have been in the hobby for a decade but my first octo. I was able to spot him swimming and hiding for the first couple hours, then boom he has been missing for two days since. I am able to spot him pretty good up untill then. There was a 10 minute window where he could have maybe escaped while I walked away to accilimate the other fish that came, but I have searched in every crevice of every rock in the eqiiptment and he is no where to be found. He was about 4 inches big. Could he be hiding so deep in a live rock that I cant find him?