2025 Proclaimed the 'Year of the Octopus' Off England's Southern Shores.

Exceptionally high encounters of a remarkably clever cephalopod during the summer season have led to the naming of 2025 as the octopus's year in an annual review of UK coastal waters.

A Perfect Storm Driving a Surge

A mild winter coupled with a very warm springtime triggered a massive influx of *Octopus vulgaris* to establish themselves along the shores from Cornwall to Devon, spanning the Cornish and Devonian coasts.

“The volume of octopuses caught was roughly over a dozen times what we would usually anticipate in this region,” commented an ocean conservation expert. “Based on the totals, around 233 thousand octopuses were caught in UK waters this year – which is a significant rise from the norm.”

The common octopus is native to UK waters but typically so rare it is seldom observed. A population bloom is caused by the dual effect of gentle winter conditions and favorable spring temperatures. Such favorable circumstances meant more larvae, possibly in part fuelled by large numbers of a favored prey species also recorded.

A Rare Phenomenon

The most recent occasion, an octopus bloom this significant was observed in the 1950s, with archival data indicating the last bloom prior to that occurred in 1900.

The remarkable abundance of octopuses meant they could be readily observed in coastal areas for the first time in living memory. Video footage show octopuses being sociable – contrary to their normally lone nature – and moving along the seabed on their arm ends. One individual was even seen investigating a diver's camera.

“During a first dive off the Lizard peninsula this year I saw multiple octopuses,” the specialist continued. “They are large specimens. There are two types in UK waters. The curled octopus is smaller, about the size of a football, but the *Octopus vulgaris* can be with a span of 1.5 meters.”

Future Prospects and Other Surprises

If conditions remain mild this coming winter suggests the potential a repeat event next year, because based on records, in similar situations, events have occurred consecutively for two years running.

“But, it's improbable, from previous blooms, that it will go on for a long time,” they cautioned. “Marine life is unpredictable these days so it’s quite an unpredictable situation.”

The assessment also noted other “surprises, successes and joyful moments” around the UK coastline, including:

• Highest-ever counts of grey seals seen in Cumbria.
• Record numbers of the iconic seabirds on a Welsh island.
• The initial discovery of a rare sea slug in Yorkshire, normally residing farther south.
• A variable blenny discovered off the coast of Sussex for the first time.

A Note of Caution

Challenges were also present, however. “The year was bookended by ecological challenges,” noted a conservation leader. “A significant shipping incident in the North Sea and the release of tonnes of plastic biobeads off the southern coast served as stark reminders. Staff and volunteers are working tirelessly to safeguard and rehabilitate our coasts.”