i was wondering if cuttles have night vision abilities and/or the ability to dicern amounts of light (shadows). the main reason i was asking is last night i was walking past my tank when the lights were all off in the tank and only a small lamp on the other side of the room was on. as i walked past the tank my cuttle inked and i guess i must have frightened it. The only thing is that it was very dark if i had not been paying attention to the lil guy as i walked buy i would never had seen it. so do cuttles have night vision or could he just see my shadow as i walked in front of the tank.