Complex sentence: The two principal islands in the Belep Archipelago are Art Island (aka Aar) and Pott Island (aka Phwoc), and the rest of the archipelago consists of the Northern Daos Islands, the Southern Daos Islands, and several very small islets.
Split into simpler sentences: The two principal islands in the Belep Archipelago are Art Island (aka Aar) and Pott Island (aka Phwoc). The rest of the archipelago consists of the Northern and Southern Daos Islands, and several very small islets.