Record-breaking encounters of a supremely intelligent sea creature over the summer months have resulted in the naming of 2025 as the octopus's year in an annual review of UK coastal waters.
A mild winter followed by a remarkably hot spring triggered a massive influx of *Octopus vulgaris* to settle along the shores from Cornwall to Devon, from Penzance in Cornwall to south Devon.
“The scale of the catch was of the order of about thirteen times what we would normally expect in this region,” commented a marine conservation officer. “Calculating the figures, around 233 thousand octopuses were present in British seas this year – which is a significant rise from historical averages.”
The common octopus is indigenous to these waters but usually so scarce it is infrequently encountered. A sudden increase is caused by the dual effect of a mild winter and favorable spring temperatures. Such favorable circumstances meant a higher survival rate for young, maybe aided by large numbers of other marine life also recorded.
The most recent occasion, such an octopus proliferation this significant was documented in the mid-20th century, with past documentation indicating the previous major event occurred in the turn of the 20th century.
The sheer quantity of octopuses meant they could be frequently seen in nearshore environments for the first time in recent history. Diver videos show octopuses congregating together – contrary to their normally lone nature – and “walking” along the bottom on the tips of their limbs. One creature was even filmed grabbing a diver's camera.
“On my initial dive off the Lizard peninsula this year I saw multiple octopuses,” the officer added. “They are sizeable. There are two types in the region. One species is smaller, about the size of a football, but these newcomers can be up to a metre and a half wide.”
If conditions remain mild this coming winter could lead to a second bloom the following year, because based on records, with such patterns, events have occurred consecutively for two years in a row.
“Still, the chances are low, looking at history, that it will become a permanent fixture,” they stated. “The ocean is full of surprises these days so it’s quite an unpredictable situation.”
The annual review also highlighted additional positive marine news along the coast, including:
Challenges were also present, however. “The year was bookended by environmental disasters,” stated an expert. “A significant shipping incident in March and an accidental discharge of industrial pellets off the southern coast served as stark reminders. Staff and volunteers are making huge efforts to defend and heal our marine habitats.”
