You know that Octopus just told an off color joke and is lookin' round with a funny look on his face to see if anyone got it or got offended by it. He thinks he's the King of the side-eye but he knows that he's second banana to Elliott and Sandy in that regard because you can
still barely see that second eye also giving you the glance askance. To this day, nobody knows if Sandy has stereo vision and even Krobus has been known to approach Elliott from the right, make faces and yell "Boo!" and still not be seen. Wearing a Hat and Coat of course, don't let's be silly! It's OK though, Octodad is single-tentacledly matching both their eye and limb count so you gotta give him props for putting that extra effort in.
Unfortunately for the Octopus, he's still only the Prince-in-waiting of the side-eye in his home Ocean as there's one überachiever who's put in the extra millennia to achieve a double side-eye at the same time on the same side:
Imagine the caliber of off-color jokes this li'l guy tells that necessitated thousands of generations of Natural Selection just to achieve the proper bone structure to sell the punchline. The Ocean's gotta be a pretty funny place.