2025 Declared The Year for Octopuses Off Britain's South Coast.

Unprecedented observations of a remarkably clever cephalopod during the summer season have prompted the declaration of 2025 as the year for octopuses in an annual review of the nation's marine environment.

A Perfect Storm Leading to an Explosion

A gentle winter and then a very warm springtime catalyzed unprecedented numbers of *Octopus vulgaris* to settle along England’s south coast, across the southwestern peninsula.

“The reported landings was of the order of about 13 times what we would normally expect in the waters around Cornwall,” stated a marine conservation officer. “When we added up the numbers, around 233 thousand octopuses were caught in British seas this year – which is a significant rise from what is typical.”

The Mediterranean octopus is native to UK waters but typically so rare it is rarely seen. A sudden increase is attributed to a combination of gentle winter conditions and favorable spring temperatures. Such favorable circumstances meant increased juvenile survival, possibly in part fuelled by abundant stocks of a favored prey species noted in recent years.

A Historic Event

The last time, such an octopus proliferation this significant was observed in the mid-20th century, with past documentation indicating the last bloom prior to that occurred in the turn of the 20th century.

The remarkable abundance of octopuses meant they could be frequently seen in coastal areas for the first time in recent history. Diver videos show octopuses gathering in groups – unlike their typical solitary behavior – and “walking” along the bottom on the tips of their limbs. One creature was even recorded reaching for an underwater camera.

“On my initial dive off the Lizard peninsula this year I saw five of these creatures,” the specialist continued. “They are large specimens. There are two types in these waters. The curled octopus is rather small, about the size of a football, but the *Octopus vulgaris* can be reaching impressive sizes.”

Predictions and Marine Joy

Another mild winter going into 2026 meant it was possible another surge in 2026, because historically, under these conditions, the blooms have repeated for two consecutive years.

“But, it's improbable, looking at history, that it will become a permanent fixture,” they said. “But the sea keeps giving us surprises these days so it’s a very uncertain scenario.”

The report also celebrated further encouraging coastal sightings around the UK coastline, including:

• Unprecedented numbers of grey seals seen in one northern region.
• Record numbers of the iconic seabirds on an island off Wales.
• The initial discovery of a rare sea slug in a northern county, typically a southwestern species.
• A variable blenny found off the coast of Sussex for the first occasion.

Environmental Concerns

Not everything was good news, however. “The year was bookended by environmental disasters,” stated an expert. “A major tanker collision in the North Sea and a spill of plastic pollution off the Sussex coast were serious issues. Dedicated individuals are working tirelessly to protect and restore our shorelines.”