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

Exceptionally high encounters of a remarkably clever cephalopod over the summer months have resulted in the designation of 2025 as the year for octopuses in an annual review of UK coastal waters.

Ideal Conditions Leading to an Explosion

A mild winter and then a very warm springtime triggered a huge population of common octopuses (*Octopus vulgaris*) to take up residence along England’s south coast, from Penzance in Cornwall to south Devon.

“The volume of octopuses caught was roughly 13 times what we would normally expect in this region,” commented a marine conservation officer. “Based on the totals, approximately 233,000 octopuses were found in these waters this year – that’s a huge increase from what is typical.”

*Octopus vulgaris* is indigenous to these waters but ordinarily in such small numbers it is infrequently encountered. An explosive growth is the result of the dual effect of a mild winter and favorable spring temperatures. These ideal conditions meant more larvae, maybe aided by large numbers of a favored prey species noted in recent years.

An Uncommon Occurrence

The last time, an octopus bloom of this size was documented in the mid-20th century, with historical records indicating the last bloom prior to that occurred in 1900.

The remarkable abundance of octopuses meant they could be easily spotted in nearshore environments for the first time in recent history. Diver videos show octopuses congregating together – contrary to their normally lone nature – and ambulating along the ocean floor on the tips of their limbs. A curious octopus was even recorded reaching for an underwater camera.

“During a first dive in that area this year I saw five of these creatures,” the specialist continued. “They are sizeable. 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 reaching impressive sizes.”

Looking Ahead & Coastal Highlights

If conditions remain mild this coming winter suggests the potential a second bloom the following year, because historically, with such patterns, the blooms have repeated for two years in a row.

“But, it's improbable, looking at history, that it will become a permanent fixture,” they stated. “The ocean is full of surprises currently so it’s hard to forecast.”

The annual review also noted additional positive marine news along the coast, including:

• Unprecedented numbers of gray seals observed in one northern region.
• Record numbers of the iconic seabirds on Skomer.
• 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 time.

Environmental Concerns

The year had its low points, however. “The period was framed by environmental disasters,” stated an expert. “A significant shipping incident in March and the release of industrial pellets off the Sussex coast highlighted ongoing threats. Conservation teams are making huge efforts to defend and heal our marine habitats.”