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

Unprecedented encounters of one of the world's most intelligent invertebrates over the summer months have resulted in the declaration of 2025 as the year for octopuses in a seasonal assessment of UK coastal waters.

A Perfect Storm Driving a Surge

A gentle winter followed by a very warm springtime triggered a massive influx of common octopuses (*Octopus vulgaris*) to settle along England’s south coast, spanning the Cornish and Devonian coasts.

“The volume of octopuses caught was of the order of about 13 times what we would usually anticipate in the waters around Cornwall,” explained a marine life specialist. “Calculating the figures, around 233 thousand octopuses were caught in UK waters this year – which is a significant rise from the norm.”

The common octopus is native to UK waters but usually so scarce it is seldom observed. A population bloom is the result of a combination of a mild winter and a warm breeding season. These ideal conditions meant more larvae, potentially supported by abundant stocks of a favored prey species noted in recent years.

A Historic Event

The most recent occasion, such an octopus proliferation of this size was documented in the 1950s, with archival data indicating the one before that happened in 1900.

The sheer quantity of octopuses meant they could be frequently seen in coastal areas for a rare occurrence. Diver videos show octopuses gathering in groups – contrary to their normally lone nature – and “walking” along the ocean floor on their tentacle tips. A curious octopus was even filmed grabbing submarine recording equipment.

“During a first dive there this year I saw multiple octopuses,” they noted. “And these are big. There are two types in UK waters. The curled octopus is smaller, the size of a ball, 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 meant it was possible a repeat event the following year, because historically, with such patterns, the blooms have repeated for two consecutive years.

“However, it is unlikely, looking at history, that it will become a permanent fixture,” they stated. “But the sea keeps giving us surprises currently so it’s quite an unpredictable situation.”

The assessment also noted additional positive marine news across British shores, including:

• Unprecedented numbers of gray seals recorded in Cumbria.
• Record numbers of puffins on a Welsh island.
• A first-ever sighting of a rare sea slug in a northern county, normally residing farther south.
• A Mediterranean fish species found off the coast of a southern county for the first occasion.

Not All Positive News

The year had its low points, however. “The calendar year was marked by environmental disasters,” said a head of marine conservation. “A major tanker collision in March and an accidental discharge of tonnes of plastic biobeads off the Sussex coast were serious issues. Staff and volunteers are working tirelessly to protect and restore our marine habitats.”