2025 Proclaimed The Year for Octopuses Off England's South Coast.

Record-breaking sightings of a remarkably clever cephalopod this past summer have led to the naming of 2025 as the year for octopuses in a seasonal assessment of UK coastal waters.

A Perfect Storm Driving a Surge

A gentle winter and then a remarkably hot spring prompted unprecedented numbers of *Octopus vulgaris* to establish themselves along England’s south coast, from Penzance in Cornwall to south Devon.

“The reported landings was of the order of about over a dozen times what we would normally expect in Cornish waters,” explained a marine conservation officer. “When we added up the numbers, around 233 thousand octopuses were found in UK waters this year – representing a massive jump from historical averages.”

*Octopus vulgaris* is found in these waters but ordinarily in such small numbers it is rarely seen. A sudden increase is the result of a combination of gentle winter conditions and a warm breeding season. This perfect scenario meant a higher survival rate for young, maybe aided by large numbers of other marine life also recorded.

A Rare Phenomenon

The last time, an octopus bloom of this size was recorded in the 1950s, with archival data indicating the previous major event happened in 1900.

The huge numbers of octopuses meant they could be frequently seen in coastal areas for a rare occurrence. Video footage show octopuses gathering in groups – they are usually solitary – and moving along the ocean floor on their tentacle tips. A curious octopus was even filmed grabbing submarine recording equipment.

“The first time I dived there this year I saw multiple octopuses,” the officer added. “They are sizeable. There are two types in these waters. The curled octopus is rather small, the size of a ball, but these common octopuses can be with a span of 1.5 meters.”

Predictions and Marine Joy

A second gentle winter going into 2026 suggests the potential a repeat event the following year, because in the past, under these conditions, the blooms have repeated for two years running.

“However, it is unlikely, based on past events, that it will become a permanent fixture,” they said. “But the sea keeps giving us surprises currently so it’s quite an unpredictable situation.”

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

• Highest-ever counts of gray seals observed in one northern region.
• Peak numbers of puffins on a Welsh island.
• A first-ever sighting of an unusual mollusc in a northern county, typically a southwestern species.
• A variable blenny discovered off the coast of a southern county for the first occasion.

A Note of Caution

Not everything was good news, however. “The year was bookended by marine incidents,” stated an expert. “A major tanker collision in the North Sea and the release of plastic pollution off the Sussex coast highlighted ongoing threats. Dedicated individuals are working tirelessly to safeguard and rehabilitate our shorelines.”