What will happen to the world ocean under ancap? Will anyone have ownership rights to it?

Ashot

Right now, international neutral waters represent a curious space of partial ancap. While not being anyone’s property, they allow a vessel to remain almost entirely extraterritorial (a vessel is considered the territory of the flag state, and therefore the market has decided in favor of convenient flags—such states have large merchant fleets, sometimes without even bothering to have access to the sea).

That is precisely why, when ancap arrives on land, the changes at sea will be minimal. A vessel will remain the private property of its owner, fishing grounds will be jointly operated by fishing companies (and if they fail to carefully read Elinor Ostrom, the market will punish them), there will be an increased likelihood of encountering pirates in the straits (but a rich set of tools can be used against them), the water will remain salty, and the great garbage patch will remain localized in the Pacific Ocean, existing by the will of the prevailing currents.

As wild fish becomes more expensive, humanity will increasingly switch to farmed fish; as plastic becomes more expensive, there will be a growing temptation to fish it out of the ocean for recycling; as the population grows and seasteading becomes cheaper, a considerable part of the ocean may become the territorial waters of new floating islands; until then, it is unlikely that anyone will start carving it into small plots.

Modern ancaps see the future of the ocean, while states persist on land, something like this