2025 Hailed as the 'Year of the Octopus' Along Britain's Southern Shores.
Exceptionally high sightings of a remarkably clever cephalopod during the summer season have resulted in the declaration of 2025 as the year for octopuses in a seasonal assessment of UK coastal waters.
Ideal Conditions Driving a Surge
A mild winter and then a very warm springtime triggered unprecedented numbers of *Octopus vulgaris* to take up residence along England’s south coast, spanning the Cornish and Devonian coasts.
“The volume of octopuses caught was approximately thirteen times what we would typically see in the waters around Cornwall,” stated a marine life specialist. “When we added up the numbers, nearly a quarter of a million octopuses were present in UK waters this year – representing a massive jump from what is typical.”
*Octopus vulgaris* is found in these waters but usually so scarce it is seldom observed. An explosive growth is attributed to a combination of gentle winter conditions and favorable spring temperatures. This perfect scenario meant more larvae, maybe aided by abundant stocks of a favored prey species also recorded.
A Historic Event
The most recent occasion, a population surge of this scale of this size was recorded in 1950, with archival data indicating the one before that was in 1900.
The huge numbers of octopuses meant they could be frequently seen in shallow waters for the first time in living memory. Diver videos show octopuses gathering in groups – they are usually solitary – and ambulating along the ocean floor on their tentacle tips. One individual was even recorded reaching for an underwater camera.
“On my initial dive there this year I saw five octopuses,” the specialist continued. “They are sizeable. Two kinds exist in the region. The curled octopus is smaller, about the size of a football, but the *Octopus vulgaris* can be up to a metre and a half wide.”
Future Prospects and Other Surprises
If conditions remain mild heading into next year meant it was possible a repeat event in 2026, because in the past, in similar situations, events have occurred consecutively for two consecutive years.
“But, it's improbable, from previous blooms, that it will become a permanent fixture,” they stated. “But the sea keeps giving us surprises currently so it’s quite an unpredictable situation.”
The report also noted additional positive marine news around the UK coastline, including:
- Unprecedented numbers of grey seals seen in one northern region.
- Exceptional populations of the iconic seabirds on Skomer.
- The initial discovery of a rare sea slug in Yorkshire, usually found in the south-west.
- A type of blenny spotted off the coast of a southern county for the first occasion.
A Note of Caution
The year had its low points, however. “The year was bookended by ecological challenges,” said a head of marine conservation. “A significant shipping incident in March and a spill of tonnes of plastic biobeads off the Sussex coast highlighted ongoing threats. Staff and volunteers are putting in immense work to defend and heal our coasts.”
