The most dominant merchant and traders of the Indian Ocean Trade network were

Chinese merchants
Muslim and Arab merchants
African merchants
Australian and Oceania merchants
European Merchants

http://en.wikipedia.org/wiki/Indian_Ocean_trade

The most dominant merchants and traders of the Indian Ocean Trade network were Muslim and Arab merchants. To arrive at this answer, we can analyze the historical context and trade patterns of the Indian Ocean region during that time period.

1. Historical Context: The Indian Ocean Trade network was a vast system of interconnected trade routes that facilitated the exchange of goods, ideas, and cultures between regions bordering the Indian Ocean. This trade network flourished during the medieval period from the 7th to the 15th centuries.

2. Trade Patterns: The Indian Ocean Trade network was a hub for the exchange of goods such as spices, textiles, precious metals, horses, and luxury goods like porcelain. The most dominant merchants in this trade network were Muslim and Arab merchants.

- Muslim Merchants: The spread of Islam throughout the Indian Ocean region led to the emergence of Muslims as prominent participants in the trade network. Muslim merchants from various regions, including the Arabian Peninsula, Persia, and the Indian subcontinent, played a crucial role in facilitating trade across the Indian Ocean.

- Arab Merchants: Arab traders, specifically from the Red Sea and Persian Gulf regions, possessed extensive knowledge of wind patterns and maritime navigation, which gave them an advantage in conducting long-distance trade in the Indian Ocean. They established numerous trading posts and ports along the coastlines of Africa, Arabia, India, and Southeast Asia.

While Chinese merchants did participate in the Indian Ocean Trade network, they were not as dominant as Muslim and Arab merchants. Chinese trade during this period primarily focused on maritime activities in the South China Sea and the East China Sea, rather than the wider Indian Ocean region. African, Australian, Oceania, and European merchants also had a presence in the Indian Ocean Trade network, but they were less influential compared to Muslim and Arab merchants.

In conclusion, Muslim and Arab merchants were the most dominant participants in the Indian Ocean Trade network due to their strategic geographical location, extensive trading networks, and cultural connections.