🔗 Share this article 2025 Hailed as 'The Octopus Year' Along England's Southern Shores. Record-breaking encounters of a supremely intelligent sea creature over the summer months have prompted the naming of 2025 as the octopus's year in a yearly report of UK coastal waters. Ideal Conditions Driving a Surge A gentle winter coupled with a very warm springtime prompted unprecedented numbers of *Octopus vulgaris* to settle along England’s south coast, spanning the Cornish and Devonian coasts. “The scale of the catch was approximately over a dozen times what we would usually anticipate in the waters around Cornwall,” commented a marine conservation officer. “Calculating the figures, around 233 thousand octopuses were present in UK waters this year – which is a significant rise from the norm.” The Mediterranean octopus is found in these waters but usually so scarce it is rarely seen. An explosive growth is the result of a combination of a mild winter and a warm breeding season. This perfect scenario meant more larvae, maybe aided by large numbers of a favored prey species also recorded. A Historic Event The last time, a population surge of this scale of this size was observed in the mid-20th century, with past documentation indicating the previous major event occurred in 1900. The huge numbers of octopuses meant they could be readily observed in shallow waters for the first time in recent history. Diver videos show octopuses being sociable – they are usually solitary – and moving along the ocean floor on their tentacle tips. A curious octopus was even recorded reaching for an underwater camera. “During a first dive there this year I saw five of these creatures,” they noted. “They are large specimens. There are two types in UK 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.” Looking Ahead & Coastal Highlights A second gentle winter this coming winter suggests the potential a repeat event the following year, because based on records, in similar situations, the blooms have repeated 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 a very uncertain scenario.” The annual review also highlighted additional positive marine news along the coast, including: A record number of grey seals observed in Cumbria. Record numbers of puffins on Skomer. A first-ever sighting of the *Capellinia fustifera* nudibranch in a northern county, normally residing farther south. A type of blenny found off the coast of a southern county for the inaugural time. Not All Positive News Challenges were also present, however. “The year was bookended by marine incidents,” noted a conservation leader. “A major tanker collision in the North Sea and the release of tonnes of plastic biobeads off the southern coast served as stark reminders. Staff and volunteers are putting in immense work to defend and heal our marine habitats.”
Record-breaking encounters of a supremely intelligent sea creature over the summer months have prompted the naming of 2025 as the octopus's year in a yearly report of UK coastal waters. Ideal Conditions Driving a Surge A gentle winter coupled with a very warm springtime prompted unprecedented numbers of *Octopus vulgaris* to settle along England’s south coast, spanning the Cornish and Devonian coasts. “The scale of the catch was approximately over a dozen times what we would usually anticipate in the waters around Cornwall,” commented a marine conservation officer. “Calculating the figures, around 233 thousand octopuses were present in UK waters this year – which is a significant rise from the norm.” The Mediterranean octopus is found in these waters but usually so scarce it is rarely seen. An explosive growth is the result of a combination of a mild winter and a warm breeding season. This perfect scenario meant more larvae, maybe aided by large numbers of a favored prey species also recorded. A Historic Event The last time, a population surge of this scale of this size was observed in the mid-20th century, with past documentation indicating the previous major event occurred in 1900. The huge numbers of octopuses meant they could be readily observed in shallow waters for the first time in recent history. Diver videos show octopuses being sociable – they are usually solitary – and moving along the ocean floor on their tentacle tips. A curious octopus was even recorded reaching for an underwater camera. “During a first dive there this year I saw five of these creatures,” they noted. “They are large specimens. There are two types in UK 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.” Looking Ahead & Coastal Highlights A second gentle winter this coming winter suggests the potential a repeat event the following year, because based on records, in similar situations, the blooms have repeated 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 a very uncertain scenario.” The annual review also highlighted additional positive marine news along the coast, including: A record number of grey seals observed in Cumbria. Record numbers of puffins on Skomer. A first-ever sighting of the *Capellinia fustifera* nudibranch in a northern county, normally residing farther south. A type of blenny found off the coast of a southern county for the inaugural time. Not All Positive News Challenges were also present, however. “The year was bookended by marine incidents,” noted a conservation leader. “A major tanker collision in the North Sea and the release of tonnes of plastic biobeads off the southern coast served as stark reminders. Staff and volunteers are putting in immense work to defend and heal our marine habitats.”