One of the most catastrophic scenarios that could hit this planet would be a world without fish. Surely this is a matter for the UN to act on – and swiftly. Areas of oceans should be set aside as no-go zones for trawlers of any nationality, to enable our dwindling fish stocks to have somewhere to reproduce with impunity. We are told that farmed fish is just as good, but this is futile if the wild fish that are fed to the farmed fish disappear. This crisis should be moved right to the top of the global agenda.