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

Exceptionally high sightings of a supremely intelligent sea creature over the summer months have led to the designation of 2025 as the octopus's year in a yearly report of UK coastal waters.

A Perfect Storm Leading to an Explosion

A gentle winter coupled with a remarkably hot spring triggered unprecedented numbers of *Octopus vulgaris* to take up residence along the southern coastline of England, across the southwestern peninsula.

“The reported landings was approximately over a dozen times what we would typically see in this region,” explained a marine conservation officer. “When we added up the numbers, nearly a quarter of a million octopuses were caught in British seas this year – that’s a huge increase from the norm.”

*Octopus vulgaris* is indigenous to UK waters but typically so rare it is seldom observed. A population bloom is attributed to the dual effect of gentle winter conditions and favorable spring temperatures. These ideal conditions meant increased juvenile survival, potentially supported by abundant stocks of spider crabs seen in the area.

A Rare Phenomenon

The most recent occasion, an octopus bloom this significant was recorded in the 1950s, with archival data indicating the last bloom prior to that happened in the turn of the 20th century.

The huge numbers of octopuses meant they could be easily spotted in shallow waters for a rare occurrence. Video footage show octopuses being sociable – contrary to their normally lone nature – and moving along the ocean floor on the tips of their limbs. A curious octopus was even recorded reaching for submarine recording equipment.

“During a first dive in that area this year I saw five octopuses,” the specialist continued. “They are large specimens. Two kinds exist in UK waters. One species is smaller, football-sized, but these common octopuses can be up to a metre and a half wide.”

Predictions and Marine Joy

Another mild winter going into 2026 meant it was possible a second bloom the following year, because in the past, with such patterns, populations have surged again for two years in a row.

“However, it is unlikely, from previous blooms, that it will become a permanent fixture,” they cautioned. “But the sea keeps giving us surprises currently so it’s a very uncertain scenario.”

The assessment also noted further encouraging coastal sightings across British shores, including:

• Highest-ever counts of gray seals observed in Cumbria.
• Record numbers of the iconic seabirds on a Welsh island.
• The initial discovery of the *Capellinia fustifera* nudibranch in Yorkshire, usually found in the south-west.
• A variable blenny found off the coast of Sussex for the first occasion.

Not All Positive News

The year had its low points, however. “The year was bookended by environmental disasters,” said a head of marine conservation. “A significant shipping incident in March and an accidental discharge of plastic pollution off the southern coast served as stark reminders. Conservation teams are making huge efforts to safeguard and rehabilitate our shorelines.”