Piranha is a freshwater fish belonging to family Characidae. It inhabits waters of South American rivers. These are known for their powerful teeth and jaws.Kaziranga is a national park situated in the districts of Golaghat and Nagaon of the state of Assam. One horned rhinoceros protected in this national park. There are 1651 adult rhinos at present.Sericulture is a rearing of silkworm and production of silk is called sericulture. Silk moths are fed up on mulberry leaves and cocoons made are used for the extraction of silk containing protein called silk fibroin.Maloca is an ancestral long house used by the natives of the Amazon, notably in Colombia and Brazil. Each community has a maloca with its own unique characteristics like slanting roofs.Cotton textiles are usually concentrated in and around Ganga river basin.