2025 Hailed as the 'Year of the Octopus' Off England's South Coast.

Exceptionally high observations of a supremely intelligent sea creature over the summer months have resulted in the designation of 2025 as the octopus's year in an annual review of UK coastal waters.

A Perfect Storm for a Population Boom

A gentle winter and then a remarkably hot spring catalyzed a huge population of common octopuses (*Octopus vulgaris*) to establish themselves along the southern coastline of England, spanning the Cornish and Devonian coasts.

“The reported landings was approximately thirteen times what we would typically see in the waters around Cornwall,” explained an ocean conservation expert. “Calculating the figures, around 233 thousand octopuses were found in these waters this year – representing a massive jump from historical averages.”

The common octopus is native to these waters but usually so scarce it is rarely seen. A sudden increase is caused by a combination of a mild winter and favorable spring temperatures. This perfect scenario meant a higher survival rate for young, potentially supported by significant populations of a favored prey species noted in recent years.

A Rare Phenomenon

The most recent occasion, a population surge of this scale comparable was observed in the 1950s, with historical records indicating the last bloom prior to that happened in 1900.

The remarkable abundance of octopuses meant they could be easily spotted in coastal areas for the first time in recent history. Video footage show octopuses congregating together – contrary to their normally lone nature – and ambulating along the bottom on their tentacle tips. One individual was even filmed grabbing a diver's camera.

“On my initial dive there this year I saw multiple octopuses,” they noted. “And these are big. Two kinds exist in UK waters. One species is quite small, football-sized, but these newcomers can be reaching impressive sizes.”

Looking Ahead & Coastal Highlights

If conditions remain mild heading into next year could lead to another surge next year, because historically, in similar situations, events have occurred consecutively for two years running.

“However, it is unlikely, from previous blooms, that it will persist indefinitely,” they cautioned. “The ocean is full of surprises at the moment so it’s hard to forecast.”

The report also celebrated further encouraging coastal sightings along the coast, including:

• Highest-ever counts of gray seals observed in Cumbria.
• Exceptional populations of the iconic seabirds on a Welsh island.
• The initial discovery of a rare sea slug in Yorkshire, usually found in the south-west.
• A type of blenny spotted off the coast of a southern county for the first occasion.

A Note of Caution

Challenges were also present, however. “The period was framed by marine incidents,” said a head of marine conservation. “A major tanker collision in March and a spill of industrial pellets off the southern coast served as stark reminders. Dedicated individuals are putting in immense work to safeguard and rehabilitate our coasts.”