In the Amazon, a giant fish is helping to save the rainforest Even in the most biodiverse rainforest of the world, the pirarucu — also known as arapaima — stands out.The story of how involves people of different backgrounds co-operating on many levels, something veterans of the Amazon say they have seen nowhere else across the vast region.To see how things could have gone, look no further than the neighbouring Javari Valley, where British journalist Dom Phillips and Indigenous expert Bruno Pereira were murdered last June.Most belong to Cunha's extended family, whose ancestors arrived in the region from the impoverished and drought-ravaged north-east during the rubber boom to work as tappers.Founded by rubber tappers who wanted to liberate themselves from slave-like labour conditions, Asproc has grown to be one of the most-important grassroots entities in the entire Amazon."