2025 Proclaimed the 'Year of the Octopus' Off Britain's South Coast.
Exceptionally high sightings of a remarkably clever cephalopod over the summer months have led to the designation of 2025 as the octopus's year in a seasonal assessment of the nation's marine environment.
A Confluence of Factors Leading to an Explosion
A mild winter coupled with a remarkably hot spring catalyzed a huge population of *Octopus vulgaris* to establish themselves along the southern coastline of England, from Penzance in Cornwall to south Devon.
“The scale of the catch was approximately thirteen times what we would usually anticipate in Cornish waters,” stated a marine conservation officer. “Based on the totals, around 233 thousand octopuses were caught in British seas this year – which is a significant rise from historical averages.”
*Octopus vulgaris* is indigenous to UK waters but usually so scarce it is infrequently encountered. A population bloom is the result of the dual effect of gentle winter conditions and a warm breeding season. This perfect scenario meant more larvae, maybe aided by abundant stocks of other marine life seen in the area.
An Uncommon Occurrence
Previously, a population surge of this scale of this size was recorded in the 1950s, with historical records indicating the last bloom prior to that happened in the turn of the 20th century.
The sheer quantity of octopuses meant they could be easily spotted in coastal areas for the first time in recent history. Diver videos show octopuses congregating together – contrary to their normally lone nature – and “walking” along the ocean floor on their arm ends. One individual was even filmed grabbing a diver's camera.
“On my initial dive off the Lizard peninsula this year I saw five octopuses,” they noted. “They are large specimens. We have two species in these waters. The curled octopus is rather small, about the size of a football, but the *Octopus vulgaris* can be reaching impressive sizes.”
Future Prospects and Other Surprises
A second gentle winter this coming winter suggests the potential another surge next year, because historically, under these conditions, events have occurred consecutively for two years in a row.
“Still, the chances are low, based on past events, that it will go on for a long time,” they said. “But the sea keeps giving us surprises these days so it’s hard to forecast.”
The assessment also highlighted additional positive marine news along the coast, including:
- Unprecedented numbers of gray seals seen in one northern region.
- Exceptional populations of puffins on Skomer.
- A first-ever sighting of a rare sea slug in a northern county, normally residing farther south.
- A Mediterranean fish species found off the coast of a southern county for the first occasion.
Not All Positive News
Challenges were also present, however. “The period was framed by marine incidents,” said a head of marine conservation. “A major tanker collision in the North Sea and a spill of industrial pellets off the southern coast served as stark reminders. Staff and volunteers are working tirelessly to safeguard and rehabilitate our shorelines.”