I was using a moon light to illuminate mine at night time (while in the hood such that the top was off of the tank) He seemed curious in the light and watched very attentively. I then ran y finger in front of the light casting a shadow down on him,...and He went BEZERK!! Flying out of his cave and jumped out of the water! Luckily I still had this plexiglas cover sitting over the top to keep moisture from messing up my PC bulb... He hit that and fell back in... Had it not been there, Im not sure what i would of done!! I would want to just grab him in interests of keeping my fingers intact (6 inch peacock)...