A marine heatwave is expected to reach 'extreme' levels around parts of the UK, according to the Met Office, raising significant concerns for marine ecosystems.

The event, fueled by persistent heat domes and long-term ocean warming, could see sea temperatures 4-5°C above average in the English Channel and southern North Sea.

Scientists warn that prolonged exposure to such high temperatures could trigger mass die-offs among seagrasses, shellfish, and other species, while encouraging the proliferation of warm-water creatures like octopus.

The UK has experienced marine heatwaves before, but this event is projected to be particularly intense and long-lasting, with temperatures surpassing summer averages.

Researchers note that species such as cod are migrating northward, while warm-water species are increasing in numbers, disrupting existing ecological balances.

The Met Office warns that marine heatwave conditions could become the norm by mid-century if greenhouse gas emissions are not reduced, highlighting the urgent need for climate action to mitigate these impacts on marine life and coastal communities.