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

Exceptionally high sightings of a supremely intelligent sea creature this past summer have led to the declaration of 2025 as the year for octopuses in a seasonal assessment of Britain’s seas.

A Perfect Storm for a Population Boom

An unusually warm winter coupled with a very warm springtime catalyzed a huge population of common octopuses (*Octopus vulgaris*) to settle along the shores from Cornwall to Devon, spanning the Cornish and Devonian coasts.

“The volume of octopuses caught was roughly over a dozen times what we would typically see in Cornish waters,” commented a marine conservation officer. “Calculating the figures, nearly a quarter of a million octopuses were caught in UK waters this year – that’s a huge increase from historical averages.”

*Octopus vulgaris* is found in UK waters but ordinarily in such small numbers it is infrequently encountered. An explosive growth is the result of a combination of a mild winter and a warm breeding season. Such favorable circumstances meant increased juvenile survival, maybe aided by significant populations of other marine life also recorded.

A Historic Event

The most recent occasion, an octopus bloom comparable was recorded in 1950, with archival data indicating the last bloom prior to that was in 1900.

The remarkable abundance of octopuses meant they could be readily observed in shallow waters for the first time in living memory. Underwater recordings show octopuses being sociable – contrary to their normally lone nature – and “walking” along the seabed on their arm ends. One creature was even recorded reaching for an underwater camera.

“The first time I dived there this year I saw multiple octopuses,” the officer added. “They are sizeable. There are two types in UK waters. One species is quite small, football-sized, but the *Octopus vulgaris* can be with a span of 1.5 meters.”

Future Prospects and Other Surprises

If conditions remain mild heading into next year could lead to another surge in 2026, because historically, in similar situations, populations have surged again for two consecutive years.

“However, it is unlikely, from previous blooms, that it will persist indefinitely,” they stated. “The ocean is full of surprises currently so it’s quite an unpredictable situation.”

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

• Highest-ever counts of gray seals observed in one northern region.
• Peak numbers of puffins on a Welsh island.
• The first recording of an unusual mollusc in a northern county, normally residing farther south.
• A variable blenny found off the coast of a southern county for the first time.

A Note of Caution

The year had its low points, however. “The calendar year was marked by environmental disasters,” stated an expert. “A significant shipping incident in March and a spill of industrial pellets off the southern coast served as stark reminders. Staff and volunteers are working tirelessly to protect and restore our marine habitats.”