Action carried out by activists from the Greenpeace ship Esperanza during their Indian Ocean tuna tour. Activists monitored and took direct action at sea against the controversial vessel Explorer II, thought to habitually use some 80 high-powered lights to aggregate fish in a potential breach of marine regulations. After initially asking the Explorer II to halt this practice Greenpeace took direct action and used pole-mounted paint spray-guns to black out the lights. The day following the Greenpeace action the Indian Ocean Tuna Commission ruled that use of these lights in fishing would be banned.