2025 Hailed as The Year for Octopuses Off England's South Coast.

Exceptionally high sightings of a remarkably clever cephalopod this past summer have prompted the designation of 2025 as the year for octopuses in an annual review of the nation's marine environment.

A Perfect Storm for a Population Boom

An unusually warm winter followed by an exceptionally warm spring triggered unprecedented numbers of Mediterranean octopuses to take up residence along the southern coastline of England, across the southwestern peninsula.

“The scale of the catch was approximately 13 times what we would usually anticipate in this region,” stated a marine conservation officer. “When we added up the numbers, approximately 233,000 octopuses were caught in British seas this year – that’s a huge increase from historical averages.”

*Octopus vulgaris* is found in these waters but typically so rare it is rarely seen. A sudden increase is attributed to a combination of gentle winter conditions 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 seen in the area.

A Historic Event

The last time, a population surge of this scale of this size was documented in 1950, with historical records indicating the last bloom prior to that happened in 1900.

The huge numbers of octopuses meant they could be easily spotted in shallow waters for the first time in living memory. Diver videos show octopuses congregating together – contrary to their normally lone nature – and moving along the seabed on their tentacle tips. A curious octopus was even seen investigating an underwater camera.

“On my initial dive in that area this year I saw multiple octopuses,” the officer added. “And these are big. There are two types in these waters. The curled octopus is quite small, about the size of a football, but the *Octopus vulgaris* can be up to a metre and a half wide.”

Predictions and Marine Joy

A second gentle winter this coming winter suggests the potential another surge in 2026, because historically, under these conditions, populations have surged again for two consecutive years.

“Still, the chances are low, from previous blooms, that it will go on for a long time,” they stated. “The ocean is full of surprises currently so it’s quite an unpredictable situation.”

The report also noted further encouraging coastal sightings along the coast, including:

• A record number of grey seals recorded in one northern region.
• Record numbers of puffins on Skomer.
• The initial discovery of the *Capellinia fustifera* nudibranch in a northern county, typically a southwestern species.
• A type of blenny spotted off the coast of Sussex for the first occasion.

Not All Positive News

Not everything was good news, however. “The year was bookended by environmental disasters,” noted a conservation leader. “A significant shipping incident in the North Sea and an accidental discharge of industrial pellets off the Sussex coast were serious issues. Staff and volunteers are putting in immense work to safeguard and rehabilitate our shorelines.”