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

Exceptionally high observations of a remarkably clever cephalopod over the summer months have prompted the declaration of 2025 as the octopus's year in an annual review of UK coastal waters.

A Perfect Storm Leading to an Explosion

A gentle winter followed by a remarkably hot spring triggered a huge population of common octopuses (*Octopus vulgaris*) to settle along England’s south coast, spanning the Cornish and Devonian coasts.

“The reported landings was approximately over a dozen times what we would usually anticipate in this region,” explained a marine conservation officer. “When we added up the numbers, nearly a quarter of a million octopuses were found in these waters this year – that’s a huge increase from the norm.”

The common octopus is indigenous to British seas but typically so rare it is infrequently encountered. A population bloom is attributed to the dual effect of a mild winter and a warm breeding season. Such favorable circumstances meant more larvae, potentially supported by abundant stocks of other marine life noted in recent years.

A Historic Event

Previously, such an octopus proliferation this significant was documented in 1950, with historical records indicating the previous major event happened in 1900.

The sheer quantity of octopuses meant they could be frequently seen in shallow waters for a rare occurrence. Diver videos show octopuses gathering in groups – unlike their typical solitary behavior – and “walking” along the bottom on their tentacle tips. A curious octopus was even seen investigating submarine recording equipment.

“During a first dive there this year I saw five octopuses,” the specialist continued. “And these are big. Two kinds exist in UK waters. One species is smaller, football-sized, but the *Octopus vulgaris* can be with a span of 1.5 meters.”

Future Prospects and Other Surprises

Another mild winter going into 2026 suggests the potential a second bloom the following year, because in the past, under these conditions, 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 said. “The ocean is full of surprises at the moment so it’s a very uncertain scenario.”

The report also noted additional positive marine news around the UK coastline, including:

• Highest-ever counts of gray seals observed in one northern region.
• Record numbers of the iconic seabirds on a Welsh island.
• The first recording of a rare sea slug in a northern county, typically a southwestern species.
• A Mediterranean fish species spotted off the coast of Sussex for the first time.

Not All Positive News

The year had its low points, however. “The period was framed by environmental disasters,” noted a conservation leader. “A major tanker collision in March and the release of tonnes of plastic biobeads off the Sussex coast were serious issues. Staff and volunteers are making huge efforts to defend and heal our coasts.”