Wadjemup (Rottnest Island), was not always an island; instead, it was connected to mainland Australia up until ~6,500 years ago. As sea levels rose, the island became isolated, providing providing refuge for the shallow, stunning reefs we know and love today. The island holds deep cultural significance for the Whadjuk Noongar people, who have a long-standing connection to this beautiful place.
RLS has been surveying Wadjemup nearly every year since 2008, with 2025 marking our 16th year (excluding 2024). Despite only 300 permanent residents, the island attracts 700,000–800,000 visitors each year. People flock to Wadjemup to experience its sparkling waters, white sandy beaches, salt lakes, wetlands—and of course, its most famous residents, the smiling quokkas (thank you, Roger Federer, for that selfie in 2018!).