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

Exceptionally high sightings of a supremely intelligent sea creature during the summer season have led to the declaration of 2025 as “the year of the octopus” in an annual review of UK coastal waters.

A Confluence of Factors Leading to an Explosion

A gentle winter coupled with a remarkably hot spring prompted unprecedented numbers of Mediterranean octopuses to establish themselves along England’s south coast, across the southwestern peninsula.

“The reported landings was approximately thirteen times what we would usually anticipate in Cornish waters,” stated an ocean conservation expert. “Calculating the figures, approximately 233,000 octopuses were found in these waters this year – representing a massive jump from historical averages.”

*Octopus vulgaris* is native to British seas but typically so rare it is infrequently encountered. An explosive growth is caused by the dual effect of gentle winter conditions and favorable spring temperatures. These ideal conditions meant more larvae, maybe aided by large numbers of spider crabs noted in recent years.

A Rare Phenomenon

The last time, such an octopus proliferation of this size was documented in the mid-20th century, with archival data indicating the one before that occurred in 1900.

The huge numbers of octopuses meant they could be readily observed in shallow waters for the first time in recent history. Underwater recordings show octopuses gathering in groups – they are usually solitary – and moving along the bottom on their tentacle tips. One individual was even filmed grabbing an underwater camera.

“On my initial dive off the Lizard peninsula this year I saw five octopuses,” the officer added. “They are large specimens. Two kinds exist in these waters. The curled octopus is quite small, football-sized, but these newcomers can be up to a metre and a half wide.”

Looking Ahead & Coastal Highlights

Another mild winter this coming winter suggests the potential another surge next year, because in the past, with such patterns, events have occurred consecutively for two years in a row.

“But, it's improbable, looking at history, that it will go on for a long time,” they stated. “The ocean is full of surprises currently so it’s quite an unpredictable situation.”

The assessment also celebrated further encouraging coastal sightings around the UK coastline, including:

• A record number of gray seals recorded in one northern region.
• Record numbers of puffins on an island off Wales.
• The initial discovery of a rare sea slug in Yorkshire, typically a southwestern species.
• A variable blenny spotted off the coast of Sussex for the first time.

Not All Positive News

Challenges were also present, however. “The year was bookended by ecological challenges,” noted a conservation leader. “A significant shipping incident in the North Sea and an accidental discharge of industrial pellets off the southern coast served as stark reminders. Conservation teams are putting in immense work to protect and restore our coasts.”