If it's real skeleton wouldn't the bones dissolve in most tanks fouling up your water chemistry. The concept would be really cool just not sure how safe it is for the fish. Medical research cadavers go through some pretty funky treatments prior to being stripped and turned into a skeleton. They can leach into the tank, formaldehyde and multiple flesh liquefying chemical under heat depending on the age of the skeleton new ones use enzymes which are safer. However I'm looking at getting a plastic one for my new 265 as the idea sounds really cool.
As far as the ethics personally I doubt they care if they know and if it were me I'd be stoked purple about laying peacefully surrounded by fish.
As far as the ethics personally I doubt they care if they know and if it were me I'd be stoked purple about laying peacefully surrounded by fish.