2025 Hailed as The Year for Octopuses Along England's South Coast.
Unprecedented observations of a remarkably clever cephalopod during the summer season have resulted in the designation of 2025 as the year for octopuses in a yearly report of UK coastal waters.
Ideal Conditions Driving a Surge
An unusually warm winter followed by a remarkably hot spring prompted a huge population of common octopuses (*Octopus vulgaris*) to settle along the shores from Cornwall to Devon, spanning the Cornish and Devonian coasts.
“The reported landings was of the order of about over a dozen times what we would normally expect in Cornish waters,” commented a marine life specialist. “Based on the totals, approximately 233,000 octopuses were caught in these waters this year – representing a massive jump from historical averages.”
*Octopus vulgaris* is found in UK waters but usually so scarce it is seldom observed. A sudden increase is caused by the dual effect of gentle winter conditions and favorable spring temperatures. This perfect scenario meant increased juvenile survival, possibly in part fuelled by abundant stocks of spider crabs also recorded.
A Rare Phenomenon
The last time, an octopus bloom comparable was observed in 1950, with archival data indicating the one before that was in 1900.
The sheer quantity of octopuses meant they could be frequently seen in shallow waters for a rare occurrence. Underwater recordings show octopuses congregating together – unlike their typical solitary behavior – and “walking” along the ocean floor on their tentacle tips. One creature was even seen investigating submarine recording equipment.
“During a first dive there this year I saw multiple octopuses,” they noted. “They are sizeable. Two kinds exist in these waters. One species is quite small, about the size of a football, but the *Octopus vulgaris* can be reaching impressive sizes.”
Looking Ahead & Coastal Highlights
If conditions remain mild this coming winter meant it was possible another surge in 2026, because historically, with such patterns, populations have surged again for two years in a row.
“But, it's improbable, based on past events, that it will persist indefinitely,” they stated. “The ocean is full of surprises currently so it’s a very uncertain scenario.”
The report also noted additional positive marine news across British shores, including:
- Highest-ever counts of gray seals observed in Cumbria.
- Exceptional populations of puffins on an island off Wales.
- A first-ever sighting of a rare sea slug in Yorkshire, usually found in the south-west.
- A variable blenny spotted off the coast of Sussex for the first time.
Not All Positive News
The year had its low points, however. “The year was bookended by marine incidents,” said a head of marine conservation. “A major tanker collision in March and the release of tonnes of plastic biobeads off the southern coast served as stark reminders. Conservation teams are putting in immense work to protect and restore our marine habitats.”
