2025 Declared the 'Year of the Octopus' Along England's Southern Shores.

Unprecedented encounters of a supremely intelligent sea creature during the summer season have led to the declaration of 2025 as the year for octopuses in a seasonal assessment of UK coastal waters.

A Confluence of Factors Driving a Surge

A mild winter followed by an exceptionally warm spring triggered unprecedented numbers of *Octopus vulgaris* to settle along England’s south coast, from Penzance in Cornwall to south Devon.

“The reported landings was roughly 13 times what we would normally expect in this region,” stated a marine conservation officer. “When we added up the numbers, approximately 233,000 octopuses were found in UK waters this year – which is a significant rise from what is typical.”

The common octopus is indigenous to UK waters but ordinarily in such small numbers it is rarely seen. A sudden increase is the result of the dual effect of a mild winter and favorable spring temperatures. This perfect scenario meant a higher survival rate for young, possibly in part fuelled by significant populations of a favored prey species also recorded.

A Rare Phenomenon

Previously, a population surge of this scale of this size was observed in the 1950s, with historical records indicating the previous major event was in 1900.

The huge numbers of octopuses meant they could be frequently seen in shallow waters for the first time in living memory. Video footage show octopuses congregating together – contrary to their normally lone nature – and moving along the bottom 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 five of these creatures,” the specialist continued. “They are sizeable. We have two species in the region. The curled octopus is rather small, about the size of a football, but these common octopuses can be up to a metre and a half wide.”

Future Prospects and Other Surprises

Another mild winter this coming winter meant it was possible a second bloom in 2026, because historically, in similar situations, the blooms have repeated for two years running.

“However, it is unlikely, from previous blooms, that it will go on for a long time,” they said. “Marine life is unpredictable these days so it’s a very uncertain scenario.”

The annual review also noted additional positive marine news across British shores, including:

• Unprecedented numbers of gray seals recorded in one northern region.
• Peak numbers of puffins on Skomer.
• The first recording of the *Capellinia fustifera* nudibranch in Yorkshire, usually found in the south-west.
• A type of blenny found off the coast of Sussex for the first occasion.

Not All Positive News

The year had its low points, however. “The period was framed by environmental disasters,” stated an expert. “A major tanker collision in March and an accidental discharge of plastic pollution off the Sussex coast served as stark reminders. Conservation teams are putting in immense work to defend and heal our shorelines.”