2025 Proclaimed the 'Year of the Octopus' Along England's South Coast.

Record-breaking observations of a supremely intelligent sea creature over the summer months have resulted in the declaration of 2025 as the octopus's year in a yearly report of Britain’s seas.

A Perfect Storm Driving a Surge

A mild winter coupled with a very warm springtime prompted a huge population of *Octopus vulgaris* to establish themselves along the southern coastline of England, spanning the Cornish and Devonian coasts.

“The scale of the catch was of the order of about over a dozen times what we would typically see in this region,” explained a marine conservation officer. “When we added up the numbers, approximately 233,000 octopuses were caught in British seas this year – that’s a huge increase from historical averages.”

The Mediterranean octopus is found in these waters but usually so scarce it is seldom observed. A population bloom is attributed to a combination of gentle winter conditions and a warm breeding season. Such favorable circumstances meant increased juvenile survival, possibly in part fuelled by large numbers of a favored prey species seen in the area.

A Rare Phenomenon

The most recent occasion, a population surge of this scale this significant was observed in 1950, with archival data indicating the last bloom prior to that occurred in 1900.

The huge numbers of octopuses meant they could be readily observed in nearshore environments for a rare occurrence. Underwater recordings show octopuses gathering in groups – contrary to their normally lone nature – and “walking” along the seabed on their arm ends. A curious octopus was even recorded reaching for a diver's camera.

“On my initial dive off the Lizard peninsula this year I saw five octopuses,” they noted. “And these are big. There are two types in these waters. The curled octopus is smaller, football-sized, but the *Octopus vulgaris* can be up to a metre and a half wide.”

Predictions and Marine Joy

If conditions remain mild heading into next year suggests the potential a repeat event the following year, because based on records, under these conditions, populations have surged again for two years in a row.

“However, it is unlikely, based on past events, that it will become a permanent fixture,” they said. “Marine life is unpredictable currently so it’s quite an unpredictable situation.”

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

• Unprecedented numbers of grey seals recorded in one northern region.
• Record numbers of puffins on Skomer.
• The initial discovery of an unusual mollusc in Yorkshire, usually found in the south-west.
• A Mediterranean fish species spotted off the coast of a southern county for the inaugural time.

Not All Positive News

Challenges were also present, however. “The year was bookended by ecological challenges,” said a head of marine conservation. “A significant shipping incident in March and the release of industrial pellets off the southern coast were serious issues. Dedicated individuals are putting in immense work to protect and restore our shorelines.”