The Arafura and Timor Seas (ATS) are part of the North Australian Shelf marine ecosystem – stretching between the Pacific and Indian Oceans across the Timor Sea and the Torres Strait. The region hosts some of the world’s richest marine biodiversity and plays an important economic and ecological role for Timor-Leste, Australia, Indonesia, and Papua New Guinea. The project aims to sustain the flow of ecosystem goods and services from the Arafura and Timor Seas and protect biodiversity through a transboundary governance strategy and sustainable management of marine-coastal ecosystems.