Slavery, trafficking, murder and corruption at all levels of government still pervade Thailand’s billion-dollar fishing industry, activists claim, despite recent arrests linked to human rights abuses and the threat of an EU-wide boycott.

The Thai government has implemented measures to crack down on trafficking and arrested more than 100 people since the EU issued its “yellow card” last April, threatening a ban on seafood imports unless Thailand cleaned up illegal fishing and labour abuses.

But activists claim too little has changed in the industry, which is estimated to be worth $7bn (£5bn) a year, despite Thai authorities and private businesses claiming they are confident they are on the right track to avoid the ban…