This has been bugging me for ages. Why do people in general (non fish keepers) believe that when a fish dies it floats to the surface? It always happens on cartoons etc, ie someone drops TNT in lake, it goes boom, all fish float to the surface. It was on an old episode of the Simpsons the other week which got me thinking about it and before I kept fish this is what I believed too. Is it just that as kids we watch cartoons with this in and believe it's true but nobody corrects us?