2025 Declared The Year for Octopuses Along England's Southern Shores.
Unprecedented sightings of a remarkably clever cephalopod this past summer have led to the declaration of 2025 as the year for octopuses in an annual review of UK coastal waters.
Ideal Conditions Driving a Surge
A gentle winter followed by an exceptionally warm spring catalyzed a huge population of *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 typically see in this region,” explained an ocean conservation expert. “Based on the totals, nearly a quarter of a million octopuses were present in these waters this year – that’s a huge increase from what is typical.”
The common octopus is native to these waters but ordinarily in such small numbers it is seldom observed. An explosive growth is attributed to the dual effect of gentle winter conditions and favorable spring temperatures. This perfect scenario meant increased juvenile survival, potentially supported by abundant stocks of spider crabs also recorded.
A Historic Event
Previously, such an octopus proliferation of this size was documented in the mid-20th century, with historical records indicating the one before that happened in 1900.
The remarkable abundance of octopuses meant they could be easily spotted in nearshore environments for a rare occurrence. Diver videos show octopuses being sociable – contrary to their normally lone nature – and “walking” along the seabed on their tentacle tips. One individual was even recorded reaching for submarine recording equipment.
“During a first dive in that area this year I saw five of these creatures,” they noted. “They are sizeable. There are two types in these waters. The curled octopus is rather small, the size of a ball, but the *Octopus vulgaris* can be up to a metre and a half wide.”
Looking Ahead & Coastal Highlights
If conditions remain mild heading into next year meant it was possible a repeat event the following year, because historically, with such patterns, events have occurred consecutively for two years in a row.
“However, it is unlikely, based on past events, that it will go on for a long time,” they said. “The ocean is full of surprises at the moment so it’s quite an unpredictable situation.”
The assessment also highlighted other “surprises, successes and joyful moments” along the coast, including:
- Unprecedented numbers of gray seals recorded in one northern region.
- Record numbers of the iconic seabirds on an island off Wales.
- The first recording of a rare sea slug in a northern county, usually found in the south-west.
- A type of blenny spotted off the coast of a southern county for the first time.
Not All Positive News
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 working tirelessly to protect and restore our shorelines.”
