Few of us can fill up the tank without buying a few snacks, cigarettes, soft drinks or other items we can live without.

The new cephalopod, also named Paul in honor of his world-famous predecessor who passed away last week, was lowered gently into his tank in a ceremony carried live on national television.

So it was no longer necessary to change the water in a tank for fish to live there. This led to the building of the first public aquariums.