Unprecedented Alliance Launches Major Study into Octopus Bloom
22/09/2025
A rare bloom of common octopus (Octopus vulgaris) has triggered an extraordinary collaboration between Plymouth City Council, Devon County Council, and DEFRA. First reported by South West fishermen, the bloom has disrupted traditional crab and lobster catches, prompting urgent scientific investigation.
Led by Dr Bryce Stewart of the Marine Biological Association, with support from Plymouth University and Plymouth Marine Laboratory, the study aims to understand the causes and consequences of the bloom. Former fisherman Dr Simon Thomas is engaging directly with local fishers to gather real-time insights, combining their knowledge with environmental data.
The project will use advanced monitoring techniques, including baited remote underwater videos and time-lapse cameras, to track octopus behaviour and develop early warning systems. Councillor Julian Brazil of Devon County Council highlighted the direct impact on coastal communities and the importance of understanding climate change’s role in warming seas and altering marine ecosystems.
This rapid, locally-led response has been praised for its integration of scientific expertise and community knowledge, offering a model for future climate-related marine research.
Read more at plymouth.gov.uk
How Is This Helping Devon Adapt To Climate Change? Â
Action NEA 2: Increased protection and expansion of blue carbon habitats and Marine Special Protected Areas (>30%) – this will reduce stress to allow habitats to adapt.
Action NEA 3: Develop a regional Invasive Species Management Plan to ensure pests, pathogens and diseases are monitored and action plans and prevention measures are developed.
Action NEA 4: Set out a regional strategy to protect, restore and enhance terrestrial carbon stores from land use change and increase the resilience where possible.
Action NEA 5: Develop long-term green space and Local Nature Recovery strategies to demonstrate what type of habitat will be supported in the future and opportunities for supporting human health.
