2025 Declared The Year for Octopuses Along Britain's Southern Shores.

Record-breaking encounters of a supremely intelligent sea creature over the summer months have prompted the declaration of 2025 as “the year of the octopus” in an annual review of the nation's marine environment.

A Perfect Storm Driving a Surge

A mild winter coupled with a very warm springtime triggered unprecedented numbers of common octopuses (*Octopus vulgaris*) to settle along the southern coastline of England, across the southwestern peninsula.

“The reported landings was approximately 13 times what we would typically see in Cornish waters,” commented an ocean conservation expert. “When we added up the numbers, around 233 thousand octopuses were found in UK waters this year – which is a significant rise from historical averages.”

The common octopus is indigenous to these waters but ordinarily in such small numbers it is seldom observed. A population bloom is the result of the dual effect of a mild winter and favorable spring temperatures. This perfect scenario meant increased juvenile survival, potentially supported by large numbers of spider crabs also recorded.

An Uncommon Occurrence

Previously, a population surge of this scale this significant was recorded in 1950, with past documentation indicating the one before that happened in 1900.

The sheer quantity of octopuses meant they could be easily spotted in nearshore environments for the first time in recent history. Diver videos show octopuses gathering in groups – contrary to their normally lone nature – and “walking” along the bottom on their arm ends. One creature was even seen investigating a diver's camera.

“The first time I dived in that area this year I saw five octopuses,” they noted. “They are large specimens. There are two types in UK waters. The curled octopus is quite small, the size of a ball, but these common octopuses can be up to a metre and a half wide.”

Looking Ahead & Coastal Highlights

Another mild winter heading into next year suggests the potential another surge in 2026, because based on records, in similar situations, populations have surged again for two years running.

“However, it is unlikely, looking at history, that it will go on for a long time,” they cautioned. “Marine life is unpredictable at the moment so it’s a very uncertain scenario.”

The report also noted other “surprises, successes and joyful moments” along the coast, including:

• A record number of gray seals observed in Cumbria.
• Exceptional populations of puffins on an island off Wales.
• The initial discovery of an unusual mollusc in a northern county, typically a southwestern species.
• A Mediterranean fish species found off the coast of Sussex for the inaugural time.

Not All Positive News

Challenges were also present, however. “The period was framed by ecological challenges,” stated an expert. “A major tanker collision in March and an accidental discharge of plastic pollution off the southern coast served as stark reminders. Conservation teams are working tirelessly to defend and heal our coasts.”