The goal? Protecting dwindling crab and lobster populations from an unprecedented octopus boom—and keeping smaller, local fishing boats viable.
The Breakdown: What is the New Rule?
The emergency bylaw targets larger commercial vessels that have recently switched from crab and lobster to fishing for octopus in Cornish waters.
The Restriction: Multi-hull vessels over 10 metres long and mono-hull vessels over 12 metres long are now prohibited from using pots to fish for octopus within the six-mile Cornwall IFCA district.
The Timeline: Affected vessels must move their pots out of the zone by July 1, 2026.
Duration: The ban will remain in place for one full year, subject to continuous review and potential six-month extensions.
Note: This will not affect the vast majority of local fishers. Around 75% of the vessels operating in the district are under 10 metres and are exempt from the ban.
Why the Rush? The Great Octopus Boom of 2026
If you’ve noticed a lot more octopus on the radar lately, you aren’t alone. The South West coast is currently experiencing a dramatic population bloom of the common octopus (Octopus vulgaris). This is a rare ecological event—only four major blooms have been recorded in the past 125 years, and this one is shaping up to be the largest yet.
While a booming marine population sounds like a win, it has created a nightmare for Cornwall’s traditional shellfish industry.
The Crustacean Crisis
Octopuses are strict, voracious carnivores, and their favourite snacks are crabs and lobsters. According to a recent report by Plymouth researchers, the influx of these eight-legged predators has caused catch rates for brown crabs, lobsters, and scallops to plummet by 30% to 50% as they feast on lobsters and and crab caught in pots.
While some fishers initially benefited from pivoting to catch octopus, over half of those surveyed reported a severe net negative impact on their livelihoods due to the collapse of traditional shellfish stocks.
Industry Reaction: A Tale of Two Fleets
The Inshore Perspective
Supporters argue the ban protects the narrow strip of coastal water that smaller boats rely on to make a living. Andrew Pascoe, a fisherman from Newlyn, expressed his relief to ITV West Country:
"I think it's the right way to go, to take that precautionary approach. Without that immediate regulation being brought in, we could see an influx of thousands and thousands of pots, which would be detrimental to the shellfish stocks."
He also noted that larger offshore boats have already had a highly successful season further out. "They've 'had their slice of the cake' in their words," he added. "And it's time for the inshore vessels to have their slice."
The Offshore & Opposing View
Not everyone is on board. Some fishers at the meeting opposed the plans, questioning whether there was enough hard data to justify the ban and expressing skepticism over whether it would actually save the crab populations.
However, the IFCA pointed out that larger vessels have the durability to fish 30 to 40 miles offshore, where octopus are still plentiful, meaning they aren't being cut off from the catch entirely.
What’s Next?
While the Cornwall IFCA has passed the vote, the emergency bylaw still requires a final sign-off from the Department for Environment, Food & Rural Affairs (DEFRA).
As Sam Davis from the Cornwall IFCA noted, this is a stepping stone toward a broader conversation about marine management. The priority right now is safeguarding crabs and lobsters, but the long-term goal is ensuring Cornwall’s waters can sustainably support both the marine ecosystem and the fishing businesses that depend on it.
Is the precautionary approach the right move for Cornish waters? Give your thoughts in the comments below.
