2025 Proclaimed the 'Year of the Octopus' Off England's Southern Shores.

Unprecedented sightings of a remarkably clever cephalopod this past summer have resulted in the designation of 2025 as the octopus's year in a seasonal assessment of Britain’s seas.

A Perfect Storm Leading to an Explosion

An unusually warm winter followed by a very warm springtime triggered a massive influx of *Octopus vulgaris* to take up residence along England’s south coast, spanning the Cornish and Devonian coasts.

“The scale of the catch was approximately thirteen times what we would normally expect in the waters around Cornwall,” explained a marine life specialist. “Based on the totals, nearly a quarter of a million octopuses were caught in British seas this year – that’s a huge increase from what is typical.”

*Octopus vulgaris* is found in these waters but usually so scarce it is seldom observed. A sudden increase is attributed to a combination of a mild winter and a warm breeding season. These ideal conditions meant more larvae, maybe aided by significant populations of a favored prey species noted in recent years.

An Uncommon Occurrence

The most recent occasion, an octopus bloom of this size was recorded in 1950, with historical records indicating the last bloom prior to that occurred in 1900.

The remarkable abundance of octopuses meant they could be readily observed in shallow waters for the first time in recent history. Diver videos show octopuses congregating together – contrary to their normally lone nature – and “walking” along the ocean floor on their tentacle tips. A curious octopus was even filmed grabbing a diver's camera.

“The first time I dived off the Lizard peninsula this year I saw five octopuses,” they noted. “And these are big. Two kinds exist in UK waters. The curled octopus is smaller, football-sized, but the *Octopus vulgaris* can be reaching impressive sizes.”

Future Prospects and Other Surprises

If conditions remain mild heading into next year suggests the potential a second bloom the following year, because historically, under these conditions, events have occurred consecutively for two years running.

“Still, the chances are low, based on past events, that it will persist indefinitely,” they cautioned. “The ocean is full of surprises currently so it’s a very uncertain scenario.”

The assessment also highlighted additional positive marine news along the coast, including:

• Highest-ever counts of grey seals seen in one northern region.
• Record numbers of the iconic seabirds on a Welsh island.
• The first recording of an unusual mollusc in a northern county, typically a southwestern species.
• A variable blenny discovered off the coast of Sussex for the inaugural time.

Environmental Concerns

Not everything was good news, however. “The year was bookended by ecological challenges,” said a head of marine conservation. “A significant shipping incident in the North Sea and the release of plastic pollution off the Sussex coast were serious issues. Dedicated individuals are putting in immense work to defend and heal our marine habitats.”