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

Unprecedented sightings of one of the world's most intelligent invertebrates over the summer months have resulted in the designation of 2025 as the year for octopuses in an annual review of the nation's marine environment.

A Perfect Storm Driving a Surge

A mild winter followed by a remarkably hot spring prompted unprecedented numbers of Mediterranean octopuses to establish themselves along the southern coastline of England, from Penzance in Cornwall to south Devon.

“The scale of the catch was of the order of about thirteen times what we would usually anticipate in Cornish waters,” commented a marine conservation officer. “When we added up the numbers, approximately 233,000 octopuses were found in these waters this year – that’s a huge increase from historical averages.”

The common octopus is found in UK waters but typically so rare it is seldom observed. An explosive growth is caused by a combination of gentle winter conditions and a warm breeding season. This perfect scenario meant a higher survival rate for young, potentially supported by large numbers of a favored prey species also recorded.

A Historic Event

The last time, an octopus bloom this significant was documented in 1950, with past documentation indicating the last bloom prior to that was in 1900.

The huge numbers of octopuses meant they could be readily observed in shallow waters for the first time in recent history. Video footage show octopuses being sociable – they are usually solitary – and ambulating along the ocean floor on the tips of their limbs. A curious octopus was even recorded reaching for a diver's camera.

“The first time I dived in that area this year I saw five of these creatures,” the officer added. “They are large specimens. Two kinds exist in the region. One species is rather small, football-sized, but the *Octopus vulgaris* can be with a span of 1.5 meters.”

Predictions and Marine Joy

If conditions remain mild this coming winter suggests the potential another surge in 2026, because historically, in similar situations, events have occurred consecutively for two years running.

“Still, the chances are low, looking at history, that it will go on for a long time,” they stated. “The ocean is full of surprises at the moment so it’s quite an unpredictable situation.”

The assessment also noted further encouraging coastal sightings along the coast, including:

• A record number of grey seals recorded in one northern region.
• Peak numbers of the iconic seabirds on Skomer.
• A first-ever sighting of the *Capellinia fustifera* nudibranch in a northern county, typically a southwestern species.
• A variable blenny spotted off the coast of Sussex for the first occasion.

A Note of Caution

Not everything was good news, however. “The period was framed by marine incidents,” noted a conservation leader. “A significant shipping incident in the North Sea and an accidental discharge of industrial pellets off the southern coast highlighted ongoing threats. Conservation teams are making huge efforts to defend and heal our coasts.”