according to Wikipedia:
Attached to the brain are two special organs, called statocysts, that allow the octopus to sense the orientation of its body relative to horizontal. An autonomic response keeps the octopus's eyes oriented so the pupil slit is always horizontal.
so how would an octopus' eye react on the ISS (assuming the octopus has an aquarium or something it can live in)? In which direction would the eye be parallel to?