Operating in Guinea Bissau, the Greenpeace ship Esperanza conducts a fisheries surveillance operation in collaboration with local fisheries enforcement officers. In less than a week, they arrest four fishing vessels for various infractions. The Chinese trawler Yi Feng 8 was arrested for only having the ship's name visible in Chinese characters. The reefer vessel Saly Reefer and Flipper 4 (both flagged to the Comoros) were arrested for illegally transshipping at sea. Chinese trawler Chang Yuan Yu 5 was arrested for not having paid a previously imposed fine.