2025 Proclaimed the 'Year of the Octopus' Off Britain's Southern Shores.
Unprecedented sightings of one of the world's most intelligent invertebrates this past summer have resulted in the naming of 2025 as “the year of the octopus” in a seasonal assessment of the nation's marine environment.
A Perfect Storm Leading to an Explosion
An unusually warm winter and then an exceptionally warm spring catalyzed a huge population of common octopuses (*Octopus vulgaris*) to settle along the southern coastline of England, from Penzance in Cornwall to south Devon.
“The reported landings was of the order of about over a dozen times what we would usually anticipate in Cornish waters,” commented an ocean conservation expert. “Based on the totals, approximately 233,000 octopuses were caught in British seas this year – representing a massive jump from what is typical.”
The Mediterranean octopus is native to these waters but typically so rare it is seldom observed. A sudden increase is attributed to a combination of a mild winter and a warm breeding season. These ideal conditions meant increased juvenile survival, potentially supported by significant populations of a favored prey species noted in recent years.
An Uncommon Occurrence
Previously, an octopus bloom comparable was observed in the 1950s, with historical records indicating the previous major event occurred in the turn of the 20th century.
The sheer quantity of octopuses meant they could be easily spotted in nearshore environments for the first time in living memory. Diver videos show octopuses congregating together – contrary to their normally lone nature – and “walking” along the bottom on their arm ends. A curious octopus was even filmed grabbing a diver's camera.
“On my initial dive there this year I saw multiple octopuses,” the officer added. “They are large specimens. There are two types in these waters. The curled octopus is smaller, football-sized, but the *Octopus vulgaris* can be reaching impressive sizes.”
Future Prospects and Other Surprises
Another mild winter this coming winter suggests the potential another surge in 2026, because in the past, under these conditions, the blooms have repeated for two consecutive years.
“But, it's improbable, looking at history, that it will go on for a long time,” they stated. “But the sea keeps giving us surprises at the moment so it’s hard to forecast.”
The report also highlighted additional positive marine news along the coast, including:
- Highest-ever counts of grey seals observed in Cumbria.
- Peak numbers of the iconic seabirds on Skomer.
- A first-ever sighting of an unusual mollusc in Yorkshire, usually found in the south-west.
- A variable blenny spotted off the coast of Sussex for the inaugural time.
Not All Positive News
Challenges were also present, however. “The period was framed by environmental disasters,” stated an expert. “A significant shipping incident in March and a spill of industrial pellets off the southern coast highlighted ongoing threats. Staff and volunteers are making huge efforts to defend and heal our shorelines.”
