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

Record-breaking encounters of a remarkably clever cephalopod this past summer have led to the designation of 2025 as the year for octopuses in a yearly report of UK coastal waters.

A Perfect Storm for a Population Boom

A mild winter followed by a remarkably hot spring prompted unprecedented numbers of *Octopus vulgaris* to settle along the southern coastline of England, from Penzance in Cornwall to south Devon.

“The volume of octopuses caught was of the order of about over a dozen times what we would normally expect in Cornish waters,” explained a marine conservation officer. “Based on the totals, around 233 thousand octopuses were present in British seas this year – that’s a huge increase from historical averages.”

*Octopus vulgaris* is indigenous to British seas but usually so scarce it is infrequently encountered. An explosive growth is attributed to a combination of a mild winter and favorable spring temperatures. Such favorable circumstances meant more larvae, maybe aided by abundant stocks of a favored prey species noted in recent years.

A Historic Event

Previously, an octopus bloom comparable was recorded in the mid-20th century, with past documentation indicating the one before that was in 1900.

The huge numbers of octopuses meant they could be easily spotted in shallow waters for the first time in recent history. Video footage show octopuses congregating together – contrary to their normally lone nature – and moving along the bottom on the tips of their limbs. One individual was even recorded reaching for a diver's camera.

“On my initial dive there this year I saw five of these creatures,” the officer added. “They are large specimens. We have two species in UK waters. The curled octopus is quite small, about the size of a football, but the *Octopus vulgaris* can be reaching impressive sizes.”

Future Prospects and Other Surprises

If conditions remain mild heading into next year meant it was possible another surge in 2026, because in the past, in similar situations, populations have surged again for two consecutive years.

“But, it's improbable, looking at history, that it will persist indefinitely,” they said. “But the sea keeps giving us surprises currently so it’s a very uncertain scenario.”

The report also highlighted additional positive marine news along the coast, including:

• Highest-ever counts of grey seals seen in one northern region.
• Exceptional populations of puffins on Skomer.
• The initial discovery of a rare sea slug in a northern county, usually found in the south-west.
• A Mediterranean fish species found off the coast of Sussex for the inaugural time.

Environmental Concerns

The year had its low points, however. “The calendar year was marked 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 marine habitats.”