🔗 Share this article 2025 Hailed as the 'Year of the Octopus' Along Britain's South Coast. Unprecedented encounters of a remarkably clever cephalopod this past summer have led to the designation of 2025 as the octopus's year in an annual review of UK coastal waters. A Perfect Storm Leading to an Explosion An unusually warm winter followed by a remarkably hot spring triggered a massive influx of common octopuses (*Octopus vulgaris*) to establish themselves along the southern coastline of England, spanning the Cornish and Devonian coasts. “The volume of octopuses caught was approximately 13 times what we would typically see in this region,” stated an ocean conservation expert. “When we added up the numbers, around 233 thousand octopuses were found in British seas this year – that’s a huge increase from the norm.” The common octopus is found in these waters but ordinarily in such small numbers it is seldom observed. A population bloom is the result of the dual effect of gentle winter conditions and a warm breeding season. Such favorable circumstances meant a higher survival rate for young, maybe aided by large numbers of spider crabs noted in recent years. An Uncommon Occurrence Previously, such an octopus proliferation of this size was recorded in 1950, with archival data indicating the one before that happened in 1900. The huge numbers of octopuses meant they could be frequently seen in nearshore environments for the first time in living memory. Diver videos show octopuses congregating together – contrary to their normally lone nature – and “walking” along the seabed on the tips of their limbs. One individual was even filmed grabbing submarine recording equipment. “During a first dive in that area this year I saw multiple octopuses,” the specialist continued. “And these are big. We have two species in the region. The curled octopus is smaller, the size of a ball, but these common octopuses can be up to a metre and a half wide.” Looking Ahead & Coastal Highlights If conditions remain mild heading into next year suggests the potential another surge the following year, because based on records, under these conditions, events have occurred consecutively for two consecutive years. “Still, the chances are low, from previous blooms, that it will persist indefinitely,” they cautioned. “The ocean is full of surprises these days so it’s hard to forecast.” The annual review also noted additional positive marine news around the UK coastline, including: A record number of gray seals recorded in Cumbria. Record numbers of the iconic seabirds on Skomer. The first recording of an unusual mollusc in a northern county, normally residing farther south. A type of blenny discovered off the coast of a southern county for the inaugural time. Environmental Concerns Challenges were also present, however. “The year was bookended by ecological challenges,” noted a conservation leader. “A significant shipping incident in March and the release of plastic pollution off the southern coast were serious issues. Dedicated individuals are putting in immense work to safeguard and rehabilitate our shorelines.”
Unprecedented encounters of a remarkably clever cephalopod this past summer have led to the designation of 2025 as the octopus's year in an annual review of UK coastal waters. A Perfect Storm Leading to an Explosion An unusually warm winter followed by a remarkably hot spring triggered a massive influx of common octopuses (*Octopus vulgaris*) to establish themselves along the southern coastline of England, spanning the Cornish and Devonian coasts. “The volume of octopuses caught was approximately 13 times what we would typically see in this region,” stated an ocean conservation expert. “When we added up the numbers, around 233 thousand octopuses were found in British seas this year – that’s a huge increase from the norm.” The common octopus is found in these waters but ordinarily in such small numbers it is seldom observed. A population bloom is the result of the dual effect of gentle winter conditions and a warm breeding season. Such favorable circumstances meant a higher survival rate for young, maybe aided by large numbers of spider crabs noted in recent years. An Uncommon Occurrence Previously, such an octopus proliferation of this size was recorded in 1950, with archival data indicating the one before that happened in 1900. The huge numbers of octopuses meant they could be frequently seen in nearshore environments for the first time in living memory. Diver videos show octopuses congregating together – contrary to their normally lone nature – and “walking” along the seabed on the tips of their limbs. One individual was even filmed grabbing submarine recording equipment. “During a first dive in that area this year I saw multiple octopuses,” the specialist continued. “And these are big. We have two species in the region. The curled octopus is smaller, the size of a ball, but these common octopuses can be up to a metre and a half wide.” Looking Ahead & Coastal Highlights If conditions remain mild heading into next year suggests the potential another surge the following year, because based on records, under these conditions, events have occurred consecutively for two consecutive years. “Still, the chances are low, from previous blooms, that it will persist indefinitely,” they cautioned. “The ocean is full of surprises these days so it’s hard to forecast.” The annual review also noted additional positive marine news around the UK coastline, including: A record number of gray seals recorded in Cumbria. Record numbers of the iconic seabirds on Skomer. The first recording of an unusual mollusc in a northern county, normally residing farther south. A type of blenny discovered off the coast of a southern county for the inaugural time. Environmental Concerns Challenges were also present, however. “The year was bookended by ecological challenges,” noted a conservation leader. “A significant shipping incident in March and the release of plastic pollution off the southern coast were serious issues. Dedicated individuals are putting in immense work to safeguard and rehabilitate our shorelines.”