Level_Head - Great Observation! I have read that the eyes stay horizontal and felt this it is not quite right about octopuses. For awhile I would try to remember to watch for countering proof but have since forgotten to review photos for that point. As you mentioned, it is quite clear in the above photos that the pupil is NOT horizontal!
Monty continues to come and play squish but is picky about how I am supposed to participate. He does not like the end of his mantle tickled and will flash his eyespot but does not leave. If I handle him in some way that he does not like, he does not hesitate to use his, leave my tank sign (going to the live rock). Sometimes he will reach over and touch the rock, waiting for me to take my hand out. If I don't then he puts another arm on the rock. If that still does not work he crosses over to it completely (not hiding or in any kind of panic). At this point, I always remove my hand. If he still wants to play he will immediately return to the glass (just testing) but will stay on the live rock if he has had enough. Since this is quite repeatable, I am certain it is an understood set of actions and responses.
Once he threatened to climb over the overflow box. I am not sure what it meant but it left no doubt he was putting his arm through the holes and over the edge for my benefit and that he was taunting me.
Monty continues to come and play squish but is picky about how I am supposed to participate. He does not like the end of his mantle tickled and will flash his eyespot but does not leave. If I handle him in some way that he does not like, he does not hesitate to use his, leave my tank sign (going to the live rock). Sometimes he will reach over and touch the rock, waiting for me to take my hand out. If I don't then he puts another arm on the rock. If that still does not work he crosses over to it completely (not hiding or in any kind of panic). At this point, I always remove my hand. If he still wants to play he will immediately return to the glass (just testing) but will stay on the live rock if he has had enough. Since this is quite repeatable, I am certain it is an understood set of actions and responses.
Once he threatened to climb over the overflow box. I am not sure what it meant but it left no doubt he was putting his arm through the holes and over the edge for my benefit and that he was taunting me.