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

Record-breaking observations of a supremely intelligent sea creature this past summer have prompted the designation of 2025 as the octopus's year in a seasonal assessment of the nation's marine environment.

A Perfect Storm Leading to an Explosion

An unusually warm winter coupled with a remarkably hot spring triggered a huge population of common octopuses (*Octopus vulgaris*) to establish themselves along England’s south coast, spanning the Cornish and Devonian coasts.

“The reported landings was roughly 13 times what we would typically see in this region,” 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.”

The common octopus is native to these waters but typically so rare it is seldom observed. A sudden increase is the result of a combination of a mild winter and favorable spring temperatures. These ideal conditions meant increased juvenile survival, potentially supported by significant populations of other marine life also recorded.

A Rare Phenomenon

The most recent occasion, an octopus bloom of this size was recorded in the 1950s, with past documentation indicating the previous major event occurred in 1900.

The remarkable abundance of octopuses meant they could be readily observed in shallow waters for the first time in living memory. Diver videos show octopuses gathering in groups – contrary to their normally lone nature – and moving along the seabed on their arm ends. A curious octopus was even recorded reaching for an underwater camera.

“The first time I dived in that area this year I saw five octopuses,” they noted. “They are sizeable. We have two species in UK waters. The curled octopus is smaller, about the size of a football, but the *Octopus vulgaris* can be with a span of 1.5 meters.”

Looking Ahead & Coastal Highlights

Another mild winter this coming winter meant it was possible a second bloom next year, because in the past, in similar situations, the blooms have repeated for two years in a row.

“Still, the chances are low, looking at history, that it will go on for a long time,” they stated. “The ocean is full of surprises at the moment so it’s a very uncertain scenario.”

The report also celebrated additional positive marine news across British shores, including:

• Highest-ever counts of gray seals recorded in one northern region.
• Exceptional populations of puffins on Skomer.
• A first-ever sighting of a rare sea slug in Yorkshire, usually found in the south-west.
• A type of blenny discovered off the coast of a southern county for the first occasion.

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 tonnes of plastic biobeads off the southern coast served as stark reminders. Conservation teams are putting in immense work to safeguard and rehabilitate our marine habitats.”