Sydney, June 3 -- Australian scientists are using cutting-edge underwater robots to explore remote and largely uncharted reef systems in the South Pacific, the University of Sydney said on Tuesday.

As part of a major international expedition, Australian scientists are mapping deep-sea habitats and biodiversity near Norfolk Island, an isolated Australian territory 1,600 km northeast of Sydney, one of the South Pacific's most ecologically important regions, according to a university press release.

Its location and mix of tropical and temperate ecosystems make it key to tracking species shifts and climate change impacts, the release said.

Equipped with high-resolution cameras and sensors, the Autonomous Underwater Vehicles are capturing tho...