2025 Proclaimed 'The Octopus Year' Along England's Southern Shores.

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

A Confluence of Factors for a Population Boom

A gentle winter coupled with a very warm springtime prompted a huge population of common octopuses (*Octopus vulgaris*) to settle along the southern coastline of England, from Penzance in Cornwall to south Devon.

“The volume of octopuses caught was of the order of about 13 times what we would usually anticipate in the waters around Cornwall,” stated an ocean conservation expert. “Based on the totals, around 233 thousand octopuses were caught in these waters this year – representing a massive jump from what is typical.”

*Octopus vulgaris* is native to these waters but typically so rare it is seldom observed. An explosive growth is the result of a combination of a mild winter and favorable spring temperatures. This perfect scenario meant more larvae, potentially supported by significant populations of other marine life noted in recent years.

A Rare Phenomenon

The most recent occasion, such an octopus proliferation of this size was documented in the 1950s, with past documentation indicating the last bloom prior to that occurred in the turn of the 20th century.

The remarkable abundance of octopuses meant they could be easily spotted in shallow waters for the first time in living memory. Underwater recordings show octopuses being sociable – unlike their typical solitary behavior – and ambulating along the seabed on their tentacle tips. One individual was even filmed grabbing submarine recording equipment.

“The first time I dived in that area this year I saw multiple octopuses,” the officer added. “And these are big. We have two species in the region. One species is rather small, about the size of a football, but these common octopuses can be reaching impressive sizes.”

Future Prospects and Other Surprises

A second gentle winter this coming winter meant it was possible a second bloom next year, because based on records, under these conditions, populations have surged again for two years running.

“But, it's improbable, looking at history, that it will go on for a long time,” they stated. “The ocean is full of surprises currently so it’s hard to forecast.”

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

• A record number of grey seals observed in Cumbria.
• Exceptional populations of the iconic seabirds on an island off Wales.
• The initial discovery of the *Capellinia fustifera* nudibranch in Yorkshire, normally residing farther south.
• A Mediterranean fish species found off the coast of a southern county for the first time.

Environmental Concerns

Challenges were also present, however. “The year was bookended by marine incidents,” said a head of marine conservation. “A major tanker collision in March and the release of plastic pollution off the Sussex coast were serious issues. Dedicated individuals are working tirelessly to safeguard and rehabilitate our coasts.”