Oceania (OC)

The Oceania (OC) realm includes a diverse range of islands across the Pacific Ocean, such as the small, culturally rich islands of Micronesia, the lush Fijian Islands, and the volcanic Hawaiian Islands. Polynesia is also part of this realm, except for New Zealand, which is categorized separately due to its unique geographical and ecological features.

The Australasian realm consists of New Zealand, Australia, and most of Melanesia.

Oceania comprises over 4,500 islands, making it one of the most fragmented yet ecologically rich regions. While the land area is small, extensive exclusive economic zones (EEZs) extend 200 nautical miles from each island, crucial for fishing and marine conservation. The islands support diverse ecosystems, including tropical rainforests and coastal wetlands, with over 6,500 plant species, about half of which are endemic.

On land, over 340 vertebrate species exist, with roughly two-thirds being endemic, showcasing the islands' unique evolutionary processes. The Pacific Ocean is unmatched in marine biodiversity, contributing to seventy percent of the world's fish catch. However, threats like overfishing and climate change endanger these ecosystems, highlighting the urgent need for sustainable practices and conservation efforts to protect the unique biodiversity of Oceania.

By Tom Radulovich - own work, using public domain map from the United States Central Intelligence Agency's World Factbook., Public Domain, https://commons.wikimedia.org/w/index.php?curid=90687473