Daniel Pauly is one of the world’s most cited fisheries researchers — and someone who’s used to making waves. He has called for a ban of subsidies that promote overfishing, such as ones that make shipping fuel cheaper or keep market prices artificially high. And he has compared the global fishery industry to an unsustainable Ponzi scheme: Just as fraudsters subsist only by finding new investors to scam, he says, fisheries survive only by finding previously unexploited stocks to fish.