There are about 3,000 species of fish endemic to the Amazon River and its tributaries. About 40% are catfish or characidae. Others include sharks, stingrays, eels and the feared piranhas. These young men are carrying on the tradition of fishing with a net. Their ancestors were hunters, gatherers and fishmen. Yet the primary food source of native Brazilians has always been farming one or two gardens. An occasional family or village managed a plantation.