Indian Ocean trade Madagascar at this time leaving behind a lasting cultural and genetic legacy. Chinese fleets under Zheng He criscrossed the Indian Ocean during the early part of the 15th century. The missions were diplomatic rather than commercial, but many exchanges of gift and produces were made. The Portuguese under Vasco da Gama discovered a naval route to the Indian Ocean through the southern tip of Africa in 1497–98. Initially, the Portuguese were mainly active in Calicut, but the northern region of Gujarat was even more important for trade, and an essential intermediary in east-west trade. Venetian interests were directly threatened as
Fishing in Portugal preserve the codfish; drying and salting are ancient techniques to keep many nutrients and the process makes the codfish tastier. The Portuguese tried to use this method of drying and salting several fishes from their waters, but the ideal fish came from much further north. With the "discovery" of Newfoundland in 1497, Portuguese fishermen started fishing its cod-rich Grand Banks. Thus, ' became a staple of the Portuguese cuisine, nicknamed ' (faithful friend). From the 18th century the town of Kristiansund in Norway became an important place of producing bacalao or klippfish, which is also exported to Portugal. In Portugal,