It's a very curious one that's for sure . I didn't name him because well.. it has no ears He loves to check out everything though. The moment the flash went off he was all over the camera. I hand feed him and it has yet to bite me, does like to hold on though while I drag him thru the water.
Many octopuses raise flaps of skin on various parts of their bodies, many do it to look like sea weeds and other marine objects... Its just one of the range of things they do to keep them safe when they are looking at something that is potentially big enough to eat them.
A number of us who have bimacs noticed the head bobbing even in young octopuses. My octo does this when he first sees me in the morning. Try bobbing your head in reply when you see this behavior, it does seem to be a form of recognition or saying hello.
Owls use a movement of the head called 'parallax effect' to take a look at an object from two slightly different views, this then allows them to get an accurate idea of how far away an object is from them..
perhaps the octos are just doing the same thing???
yeah my little one does this same thing 8) . We call it hide-n-seek :P cause he does it from behind a LR. Kinda funny, but it is every morning before work and evening when we get home. I like to think he is communicating with us :P saying howdy