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

Exceptionally high observations of a supremely intelligent sea creature during the summer season have resulted in the declaration of 2025 as the octopus's year in a yearly report of Britain’s seas.

A Confluence of Factors Driving a Surge

A gentle winter and then a very warm springtime triggered a huge population of Mediterranean octopuses to settle along England’s south coast, from Penzance in Cornwall to south Devon.

“The reported landings was approximately thirteen times what we would normally expect in this region,” commented a marine conservation officer. “Based on the totals, approximately 233,000 octopuses were present in British seas this year – that’s a huge increase from historical averages.”

*Octopus vulgaris* is found in UK waters but ordinarily in such small numbers it is infrequently encountered. A sudden increase is caused by a combination of gentle winter conditions and a warm breeding season. These ideal conditions meant more larvae, potentially supported by large numbers of other marine life noted in recent years.

A Historic Event

The most recent occasion, such an octopus proliferation this significant was recorded in the mid-20th century, with historical records indicating the previous major event was in 1900.

The huge numbers of octopuses meant they could be readily observed in nearshore environments for the first time in living memory. Diver videos show octopuses congregating together – they are usually solitary – and “walking” along the seabed on the tips of their limbs. A curious octopus was even seen investigating submarine recording equipment.

“On my initial dive in that area this year I saw multiple octopuses,” the specialist continued. “They are large specimens. There are two types in these waters. One species is quite small, the size of a ball, but these common octopuses can be reaching impressive sizes.”

Future Prospects and Other Surprises

If conditions remain mild this coming winter could lead to a second bloom the following year, because historically, under these conditions, the blooms have repeated for two years running.

“However, it is unlikely, based on past events, that it will go on for a long time,” they cautioned. “The ocean is full of surprises these days so it’s hard to forecast.”

The annual review also highlighted other “surprises, successes and joyful moments” along the coast, including:

• A record number of grey seals recorded in one northern region.
• Record numbers of the iconic seabirds on an island off Wales.
• The initial discovery of the *Capellinia fustifera* nudibranch in a northern county, normally residing farther south.
• A type of blenny found off the coast of Sussex for the first occasion.

Not All Positive News

Not everything was good news, however. “The calendar year was marked by environmental disasters,” noted a conservation leader. “A significant shipping incident in March and an accidental discharge of industrial pellets off the Sussex coast served as stark reminders. Staff and volunteers are putting in immense work to defend and heal our shorelines.”