Overview

• Marine heatwave since March has pushed spring sea temperatures 2–4°C above average off Cornwall and Devon, triggering an unprecedented surge in octopus populations.
• Brixham fish market is handling up to 36 tonnes of octopus daily, offering fishers a lucrative, quota-free opportunity with strong demand in Spain.
• Crab and lobster fishers report octopuses entering pots via escape gaps to consume shellfish, leading to steep losses and heightened tensions within the industry.
• Researchers trace the invasion to octopuses migrating from Morocco and Mauritania and warn that human-driven climate change is intensifying marine heatwaves.
• The Devon and Severn Inshore Fisheries and Conservation Authority will meet industry representatives to discuss gear adjustments and long-term management strategies.