ACTNOW is a four-year EU-funded project (Mar 2023 – Feb 2027) aiming to advance the state-of-the-art in understanding and forecasting the cumulative impacts of climate change and interacting drivers on marine systems. To stop biodiversity loss and restore natural habitats and ecosystem services. Bringing together more than 30 researchers (from physiologists to food web ecologists and physical climate scientists to policy experts) from 16 countries, ACTNOW will provide solution options. For example, it will develop monitoring methods based on new biologging technology and decision support tools for regulators.