2025 Proclaimed The Year for Octopuses Off England's South Coast.

Exceptionally high observations of a remarkably clever cephalopod this past summer have led to the declaration of 2025 as the octopus's year in a yearly report of the nation's marine environment.

A Perfect Storm Driving a Surge

An unusually warm winter and then a remarkably hot spring prompted a huge population of Mediterranean octopuses to take up residence along England’s south coast, from Penzance in Cornwall to south Devon.

“The scale of the catch was approximately thirteen times what we would typically see in Cornish waters,” explained an ocean conservation expert. “When we added up the numbers, around 233 thousand octopuses were present in UK waters this year – which is a significant rise from what is typical.”

*Octopus vulgaris* is found in UK waters but ordinarily in such small numbers it is seldom observed. A sudden increase is caused by a combination of a mild winter and favorable spring temperatures. These ideal conditions meant increased juvenile survival, maybe aided by large numbers of spider crabs noted in recent years.

A Historic Event

The last time, such an octopus proliferation comparable was observed in 1950, with past documentation indicating the last bloom prior to that occurred in the turn of the 20th century.

The sheer quantity of octopuses meant they could be easily spotted in shallow waters for the first time in recent history. Diver videos show octopuses being sociable – contrary to their normally lone nature – and moving along the seabed on the tips of their limbs. A curious octopus was even seen investigating a diver's camera.

“During a first dive there this year I saw five of these creatures,” they noted. “They are sizeable. Two kinds exist in the region. The curled octopus is smaller, the size of a ball, but the *Octopus vulgaris* can be reaching impressive sizes.”

Predictions and Marine Joy

If conditions remain mild heading into next year meant it was possible a repeat event in 2026, because in the past, under these conditions, populations have surged again for two consecutive years.

“But, it's improbable, from previous blooms, that it will become a permanent fixture,” they said. “The ocean is full of surprises at the moment so it’s hard to forecast.”

The report also highlighted further encouraging coastal sightings across British shores, including:

• Unprecedented numbers of grey seals seen in one northern region.
• Record numbers of puffins on an island off Wales.
• The initial discovery of the *Capellinia fustifera* nudibranch in Yorkshire, usually found in the south-west.
• A variable blenny found off the coast of Sussex for the inaugural time.

Environmental Concerns

The year had its low points, however. “The calendar year was marked by environmental disasters,” noted a conservation leader. “A major tanker collision in March and a spill of tonnes of plastic biobeads off the Sussex coast served as stark reminders. Dedicated individuals are working tirelessly to protect and restore our coasts.”