2025 Proclaimed The Year for Octopuses Off Britain's Southern Shores.

Record-breaking observations of a remarkably clever cephalopod over the summer months have prompted 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

An unusually warm winter followed by a remarkably hot spring prompted unprecedented numbers of common octopuses (*Octopus vulgaris*) to take up residence along England’s south coast, spanning the Cornish and Devonian coasts.

“The volume of octopuses caught was roughly over a dozen times what we would typically see in the waters around Cornwall,” stated a marine life specialist. “When we added up the numbers, approximately 233,000 octopuses were caught in UK waters this year – which is a significant rise from historical averages.”

The common octopus is indigenous to British seas but typically so rare it is seldom observed. A sudden increase is caused by a combination of gentle winter conditions and favorable spring temperatures. These ideal conditions meant a higher survival rate for young, potentially supported by abundant stocks of a favored prey species noted in recent years.

An Uncommon Occurrence

Previously, a population surge of this scale this significant was observed in the mid-20th century, with historical records indicating the last bloom prior to that was in the turn of the 20th century.

The sheer quantity of octopuses meant they could be frequently seen in coastal areas for a rare occurrence. Underwater recordings show octopuses being sociable – contrary to their normally lone nature – and ambulating along the ocean floor on the tips of their limbs. One individual was even filmed grabbing an underwater camera.

“On my initial dive off the Lizard peninsula this year I saw five octopuses,” the specialist continued. “They are large specimens. We have two species in the region. One species is quite small, football-sized, but these newcomers can be reaching impressive sizes.”

Future Prospects and Other Surprises

If conditions remain mild this coming winter suggests the potential another surge the following year, because historically, with such patterns, the blooms have repeated for two years running.

“However, it is unlikely, looking at history, that it will go on for a long time,” they said. “The ocean is full of surprises currently so it’s hard to forecast.”

The annual review also celebrated other “surprises, successes and joyful moments” across British shores, including:

• Highest-ever counts of gray seals observed in Cumbria.
• Exceptional populations of the iconic seabirds on a Welsh island.
• A first-ever sighting of the *Capellinia fustifera* nudibranch in a northern county, typically a southwestern species.
• A type of blenny spotted off the coast of Sussex for the first time.

Not All Positive News

The year had its low points, however. “The calendar year was marked by marine incidents,” said a head of marine conservation. “A significant shipping incident in March and an accidental discharge of tonnes of plastic biobeads off the southern coast highlighted ongoing threats. Dedicated individuals are making huge efforts to safeguard and rehabilitate our shorelines.”