Marine heatwave kills 30,000 fish off Western Australia coast

A significant marine heatwave off the Pilbara coast in Western Australia has caused the death of an estimated 30,000 fish, with authorities linking the event to prolonged thermal stress from elevated ocean temperatures, which are 4–5°C above normal. The fish kill occurred near Gnoorea Beach, and scientists warn that the ongoing heatwave, which started in September 2024, could have devastating effects on local ecosystems, reminiscent of a severe event in 2010-11 that severely impacted fisheries and seagrass. The heatwave conditions are expected to persist, raising concerns about potential damage to Ningaloo Reef and Shark Bay. Local resident Raelene Cooper described the situation as distressing, noting the drastic rise in water temperatures. Experts emphasize that this phenomenon highlights the broader issue of climate change and its impact on marine environments, as over 90% of heat trapped by greenhouse gases affects the oceans. Collaborative efforts are underway to monitor the situation and assess the potential long-term impacts on marine life.