I live in Tampa Florida and I have had a common vulgaris octopus I believe. It was from the southern Florida waters, somewhere probably around the Carribean. I have had him for a couple of months now with no problems and about 2 weeks ago I put in 3 blue damsels, after the 2nd night two were gone, but still one has remained in the tank. About a week ago I noticed that one of the octopus eyes had changed color from the brown with a black pupil, to a bright blue still with a black pupil. A couple days later I noticed that the same eye had turned a more whitish blue and I don't see a pupil anymore, the whole eye is now this same color. Now I have noticed the other eye is starting to change the bright blue, but still has the black pupil. The octopus still seems to be able to see fine out of both eyes, because he still recognizes things that are outside the tank as well as inside the tank. I called several of the pet shops here in Tampa and no one has ever heard of this happening!!! Can you help!!!!!!! By the way my Octopus' name is Octavius and he is an incredible creature, he comes and and swims around for hours everyday and I have been feeding him frozen clam pops called Pro Pops, his appetite is very good, he eats one clam pop everyday with no problem. I don't see any swelling or anything around his eyes either. I hope you can help with an answer for what may be wrong!!! Thanks Mike!