Britain braces for mass fish deaths as 'extreme' marine heatwave grips UK waters

Britain could be on the brink of its most severe marine heatwave on record, with scientists warning the exceptional sea temperatures may trigger widespread fish deaths and devastate marine ecosystems.Coastal waters are running as much as 5.3C above seasonal averages, with experts warning the prolonged heat could place unprecedented stress on fish and other marine life.The Thames Estuary has already entered what researchers classify as "extreme" marine heatwave conditions, according to Marine Heatwave Tracker data.Monitoring buoys around the UK recorded extraordinary temperatures throughout June, with Hastings registering the highest anomaly at 5.3C above average, followed by Liverpool Bay at 4.6C and South Knock, east of the Thames...

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