Octopus bloom spreads across UK, 100‑tonne record haul
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- Octopus vulgaris populations surged off England's south‑west coast in 2025, expanding to Wales, Dorset, East Sussex, and Scotland, according to scientific surveys and diver observations.
- Bryce Stewart of the Marine Biological Association reported a 7,700% increase in octopus catch in 2025 and a record 100 tonnes sold in a single day at Brixham market.
- Marine Biological Association researchers linked the bloom to a mild winter followed by a warm spring, attributing it to warming seas and broader marine environmental changes.
- Shellfish fishers have lost income as octopuses prey on crabs and lobsters, while other fishermen have profited from abundant octopus hauls.
- Seals and other predators such as conger eels and risso’s dolphins now feed on the octopuses, indicating a broader ecosystem shake‑up.
Why it matters: Local shellfish fishers are losing income as octopuses decimate crabs and lobsters, while opportunistic fishermen reap record octopus hauls, and predators such as seals benefit, reshaping the coastal food web. The surge, linked to warming seas, underscores climate-driven shifts in marine species distribution and highlights the economic volatility for coastal communities.
