Oceanian refers to a geographic region that includes the islands of the Pacific Ocean, encompassing countries and territories such as Australia, New Zealand, and the numerous islands of Melanesia, Micronesia, and Polynesia. This diverse area is characterized by a wide range of cultures, languages, and ecosystems, making it one of the most varied regions in the world. The region is known for its unique flora and fauna, including species like the kiwi bird and the Great Barrier Reef. Oceanian countries often face challenges such as climate change and rising sea levels, which threaten their environments and communities.