2025 Declared The Year for Octopuses Off Britain's South Coast.
Exceptionally high observations of a remarkably clever cephalopod over the summer months have prompted the declaration of 2025 as “the year of the octopus” in a yearly report of Britain’s seas.
A Perfect Storm Leading to an Explosion
A gentle winter followed by a very warm springtime prompted unprecedented numbers of *Octopus vulgaris* to take up residence along the shores from Cornwall to Devon, spanning the Cornish and Devonian coasts.
“The volume of octopuses caught was approximately thirteen times what we would usually anticipate in this region,” stated an ocean conservation expert. “When we added up the numbers, around 233 thousand octopuses were present in these waters this year – that’s a huge increase from what is typical.”
The Mediterranean octopus is indigenous to British seas but ordinarily in such small numbers it is seldom observed. A sudden increase is the result of the dual effect of gentle winter conditions and favorable spring temperatures. Such favorable circumstances meant increased juvenile survival, potentially supported by significant populations of other marine life noted in recent years.
An Uncommon Occurrence
The last time, a population surge of this scale this significant was documented in 1950, with historical records indicating the last bloom prior to that was in 1900.
The sheer quantity of octopuses meant they could be readily observed in coastal areas for a rare occurrence. Underwater recordings show octopuses congregating together – contrary to their normally lone nature – and moving along the seabed on their arm ends. One creature was even recorded reaching for submarine recording equipment.
“The first time I dived there this year I saw multiple octopuses,” the officer added. “And these are big. Two kinds exist in UK waters. The curled octopus is quite small, football-sized, but the *Octopus vulgaris* can be with a span of 1.5 meters.”
Predictions and Marine Joy
A second gentle winter heading into next year could lead to another surge the following year, because historically, in similar situations, events have occurred consecutively for two years in a row.
“However, it is unlikely, from previous blooms, that it will become a permanent fixture,” they said. “The ocean is full of surprises these days so it’s quite an unpredictable situation.”
The report also noted further encouraging coastal sightings along the coast, including:
- A record number of gray seals recorded in Cumbria.
- Peak numbers of puffins on a Welsh island.
- The first recording of the *Capellinia fustifera* nudibranch in Yorkshire, usually found in the south-west.
- A Mediterranean fish species discovered off the coast of Sussex for the inaugural time.
A Note of Caution
The year had its low points, however. “The calendar year was marked by marine incidents,” noted a conservation leader. “A significant shipping incident in the North Sea and a spill of tonnes of plastic biobeads off the southern coast highlighted ongoing threats. Staff and volunteers are putting in immense work to protect and restore our shorelines.”
