🔗 Share this article 2025 Declared the 'Year of the Octopus' Along England's South Coast. Exceptionally high observations of a supremely intelligent sea creature over the summer months have resulted in the declaration of 2025 as the year for octopuses in a seasonal assessment of UK coastal waters. A Perfect Storm Leading to an Explosion A mild winter coupled with a remarkably hot spring catalyzed a massive influx of *Octopus vulgaris* to establish themselves along England’s south coast, spanning the Cornish and Devonian coasts. “The reported landings was approximately 13 times what we would typically see in the waters around Cornwall,” commented an ocean conservation expert. “When we added up the numbers, around 233 thousand octopuses were caught in British seas this year – which is a significant rise from what is typical.” The Mediterranean octopus is indigenous to British seas but ordinarily in such small numbers it is infrequently encountered. A sudden increase is the result of a combination of a mild winter and favorable spring temperatures. These ideal conditions meant a higher survival rate for young, possibly in part fuelled by abundant stocks of a favored prey species also recorded. A Historic Event The last time, a population surge of this scale this significant was observed in the mid-20th century, with past documentation indicating the one before that occurred in the turn of the 20th century. The huge numbers of octopuses meant they could be readily observed in nearshore environments for a rare occurrence. Underwater recordings show octopuses gathering in groups – contrary to their normally lone nature – and ambulating along the ocean floor on their tentacle tips. One individual was even recorded reaching for submarine recording equipment. “During a first dive there this year I saw five octopuses,” they noted. “They are sizeable. Two kinds exist in UK waters. The curled octopus is smaller, about the size of a football, but these newcomers can be with a span of 1.5 meters.” Looking Ahead & Coastal Highlights If conditions remain mild this coming winter suggests the potential another surge in 2026, because based on records, in similar situations, the blooms have repeated for two years in a row. “However, it is unlikely, looking at history, that it will go on for a long time,” they stated. “Marine life is unpredictable at the moment so it’s quite an unpredictable situation.” The assessment also highlighted further encouraging coastal sightings across British shores, including: Highest-ever counts of grey seals observed in Cumbria. Record numbers of the iconic seabirds on Skomer. A first-ever sighting of a rare sea slug in a northern county, usually found in the south-west. A type of blenny found 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,” said a head of marine conservation. “A significant shipping incident in March and a spill of plastic pollution off the Sussex coast highlighted ongoing threats. Conservation teams are making huge efforts to safeguard and rehabilitate our coasts.”
Exceptionally high observations of a supremely intelligent sea creature over the summer months have resulted in the declaration of 2025 as the year for octopuses in a seasonal assessment of UK coastal waters. A Perfect Storm Leading to an Explosion A mild winter coupled with a remarkably hot spring catalyzed a massive influx of *Octopus vulgaris* to establish themselves along England’s south coast, spanning the Cornish and Devonian coasts. “The reported landings was approximately 13 times what we would typically see in the waters around Cornwall,” commented an ocean conservation expert. “When we added up the numbers, around 233 thousand octopuses were caught in British seas this year – which is a significant rise from what is typical.” The Mediterranean octopus is indigenous to British seas but ordinarily in such small numbers it is infrequently encountered. A sudden increase is the result of a combination of a mild winter and favorable spring temperatures. These ideal conditions meant a higher survival rate for young, possibly in part fuelled by abundant stocks of a favored prey species also recorded. A Historic Event The last time, a population surge of this scale this significant was observed in the mid-20th century, with past documentation indicating the one before that occurred in the turn of the 20th century. The huge numbers of octopuses meant they could be readily observed in nearshore environments for a rare occurrence. Underwater recordings show octopuses gathering in groups – contrary to their normally lone nature – and ambulating along the ocean floor on their tentacle tips. One individual was even recorded reaching for submarine recording equipment. “During a first dive there this year I saw five octopuses,” they noted. “They are sizeable. Two kinds exist in UK waters. The curled octopus is smaller, about the size of a football, but these newcomers can be with a span of 1.5 meters.” Looking Ahead & Coastal Highlights If conditions remain mild this coming winter suggests the potential another surge in 2026, because based on records, in similar situations, the blooms have repeated for two years in a row. “However, it is unlikely, looking at history, that it will go on for a long time,” they stated. “Marine life is unpredictable at the moment so it’s quite an unpredictable situation.” The assessment also highlighted further encouraging coastal sightings across British shores, including: Highest-ever counts of grey seals observed in Cumbria. Record numbers of the iconic seabirds on Skomer. A first-ever sighting of a rare sea slug in a northern county, usually found in the south-west. A type of blenny found 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,” said a head of marine conservation. “A significant shipping incident in March and a spill of plastic pollution off the Sussex coast highlighted ongoing threats. Conservation teams are making huge efforts to safeguard and rehabilitate our coasts.”