2025 Declared 'The Octopus Year' Off England's South Coast.
Exceptionally high observations of a remarkably clever cephalopod during the summer season have resulted in the naming of 2025 as the year for octopuses in a yearly report of UK coastal waters.
A Confluence of Factors Driving a Surge
A mild winter coupled with a remarkably hot spring prompted a massive influx of *Octopus vulgaris* to settle along England’s south coast, from Penzance in Cornwall to south Devon.
“The reported landings was of the order of about thirteen times what we would normally expect in this region,” explained an ocean conservation expert. “Calculating the figures, nearly a quarter of a million octopuses were caught in UK waters this year – that’s a huge increase from the norm.”
The Mediterranean octopus is native to these waters but typically so rare it is rarely seen. An explosive growth is caused by the dual effect of gentle winter conditions and a warm breeding season. This perfect scenario meant increased juvenile survival, possibly in part fuelled by significant populations of other marine life noted in recent years.
An Uncommon Occurrence
The last time, a population surge of this scale of this size was recorded in 1950, with archival data indicating the previous major event happened in 1900.
The remarkable abundance of octopuses meant they could be readily observed in shallow waters for a rare occurrence. Underwater recordings show octopuses being sociable – contrary to their normally lone nature – and “walking” along the seabed on their tentacle tips. One creature was even recorded reaching for an underwater camera.
“During a first dive there this year I saw five octopuses,” they noted. “They are sizeable. There are two types in the region. The curled octopus is rather small, about the size of a football, but these common octopuses can be up to a metre and a half wide.”
Predictions and Marine Joy
If conditions remain mild going into 2026 suggests the potential a repeat event the following year, because historically, in similar situations, the blooms have repeated for two years in a row.
“However, it is unlikely, from previous blooms, that it will persist indefinitely,” they stated. “But the sea keeps giving us surprises currently so it’s a very uncertain scenario.”
The assessment also noted further encouraging coastal sightings across British shores, including:
- A record number of grey seals seen in Cumbria.
- Exceptional populations of puffins on an island off Wales.
- The first recording of a rare sea slug in Yorkshire, usually found in the south-west.
- A variable blenny discovered off the coast of a southern county for the first occasion.
A Note of Caution
Not everything was good news, however. “The year was bookended by marine incidents,” said a head of marine conservation. “A major tanker collision in March and an accidental discharge of plastic pollution off the Sussex coast served as stark reminders. Conservation teams are making huge efforts to safeguard and rehabilitate our shorelines.”