With economic activity around the world taking a hammering from Covid-19, conservationists had hoped for a respite in the global shark-fishing industry. But a spate of record-breaking confiscations and expanding markets in Asia show there is still an appetite for shark fins – one that is taking a toll on underwater ecosystems and fishing communities in the region.In April, the Hong Kong authorities seized 13 tonnes ofsmuggled shark fins, mostly from endangered species. A few days later, they…