Researchers believe rising sea temperatures are to blame for the plummeting number of invertebrates such as molluscs and sea urchins at Rottnest Island off Western Australia, with some species having declined by up to 90 per cent between 2007 and 2021. curtin.edu.au Submitted by Wagamaga t3_11bvia2 on February 25, 2023 at 8:56 PM in science 17 comments 662