I reckon our P.cordiformis is right up there in the intelligence stakes (OK well.............at least some of them are........ 
) We had one that took exception to the tank lights and at some stage must've accidentally squirted water in the socket (or onto the hot bulb), of course the bulb blew after that we couldn't keep up with it, we were putting in new bulbs every couple of hours! (and yes we did get the electrician to make sure there was no fault in the electrics...didn't want to be zapped!) but this particular octopus had sussed water+bulb=no light, so we let it go (was getting very expensive!) and we got the lights altered and for good measure covered them with perspex!
j
) We had one that took exception to the tank lights and at some stage must've accidentally squirted water in the socket (or onto the hot bulb), of course the bulb blew after that we couldn't keep up with it, we were putting in new bulbs every couple of hours! (and yes we did get the electrician to make sure there was no fault in the electrics...didn't want to be zapped!) but this particular octopus had sussed water+bulb=no light, so we let it go (was getting very expensive!) and we got the lights altered and for good measure covered them with perspex! j
