2025 Declared 'The Octopus Year' Off Britain's Southern Shores.

Exceptionally high observations of a supremely intelligent sea creature during the summer season have led to the designation of 2025 as “the year of the octopus” in an annual review of UK coastal waters.

A Perfect Storm Leading to an Explosion

A mild winter and then a very warm springtime prompted a massive influx of common octopuses (*Octopus vulgaris*) to take up residence along England’s south coast, across the southwestern peninsula.

“The reported landings was roughly thirteen times what we would usually anticipate in this region,” commented a marine conservation officer. “When we added up the numbers, approximately 233,000 octopuses were caught in UK waters this year – that’s a huge increase from what is typical.”

The Mediterranean octopus is found in these waters but typically so rare it is seldom observed. A sudden increase is the result of the dual effect of gentle winter conditions and favorable spring temperatures. This perfect scenario meant increased juvenile survival, potentially supported by large numbers of other marine life seen in the area.

A Rare Phenomenon

The last time, such an octopus proliferation of this size was observed in the 1950s, with historical records indicating the previous major event was in 1900.

The remarkable abundance of octopuses meant they could be easily spotted in coastal areas for a rare occurrence. Diver videos show octopuses being sociable – unlike their typical solitary behavior – and ambulating along the bottom on the tips of their limbs. One individual was even seen investigating a diver's camera.

“During a first dive there this year I saw five octopuses,” the officer added. “And these are big. We have two species in these waters. One species is smaller, the size of a ball, but these newcomers can be reaching impressive sizes.”

Future Prospects and Other Surprises

Another mild winter going into 2026 meant it was possible a second bloom in 2026, because in the past, under these conditions, events have occurred consecutively for two years running.

“Still, the chances are low, based on past events, that it will persist indefinitely,” they stated. “Marine life is unpredictable at the moment so it’s quite an unpredictable situation.”

The report also highlighted additional positive marine news around the UK coastline, including:

• Unprecedented numbers of gray seals seen in Cumbria.
• Peak numbers of the iconic seabirds on Skomer.
• The first recording of a rare sea slug in a northern county, typically a southwestern species.
• A Mediterranean fish species found off the coast of Sussex for the inaugural time.

Not All Positive News

Challenges were also present, however. “The period was framed by environmental disasters,” said a head of marine conservation. “A significant shipping incident in the North Sea and the release of industrial pellets off the Sussex coast served as stark reminders. Staff and volunteers are working tirelessly to defend and heal our coasts.”