🔗 Share this article 2025 Hailed as The Year for Octopuses Off England's South Coast. Unprecedented observations of a remarkably clever cephalopod this past summer have resulted in the declaration of 2025 as the octopus's year in a yearly report of Britain’s seas. A Perfect Storm Driving a Surge An unusually warm winter coupled with an exceptionally warm spring triggered a massive influx of *Octopus vulgaris* to settle along the shores from Cornwall to Devon, spanning the Cornish and Devonian coasts. “The scale of the catch was roughly over a dozen times what we would normally expect in the waters around Cornwall,” commented a marine conservation officer. “Based on the totals, around 233 thousand octopuses were caught in British seas this year – that’s a huge increase from the norm.” *Octopus vulgaris* is native to British seas but ordinarily in such small numbers it is rarely seen. A population bloom is attributed to a combination of a mild winter and a warm breeding season. This perfect scenario meant increased juvenile survival, maybe aided by abundant stocks of other marine life seen in the area. An Uncommon Occurrence The most recent occasion, such an octopus proliferation this significant was observed in the mid-20th century, with archival data indicating the last bloom prior to that occurred in 1900. The remarkable abundance of octopuses meant they could be frequently seen in nearshore environments for a rare occurrence. Underwater recordings show octopuses congregating together – contrary to their normally lone nature – and ambulating along the ocean floor on the tips of their limbs. A curious octopus was even filmed grabbing a diver's camera. “During a first dive in that area this year I saw five octopuses,” the specialist continued. “They are large specimens. We have two species in these waters. One species is rather small, football-sized, but the *Octopus vulgaris* can be up to a metre and a half wide.” Looking Ahead & Coastal Highlights If conditions remain mild this coming winter suggests the potential a repeat event in 2026, because based on records, in similar situations, the blooms have repeated for two years in a row. “But, it's improbable, from previous blooms, that it will persist indefinitely,” they said. “Marine life is unpredictable currently so it’s hard to forecast.” The assessment also celebrated other “surprises, successes and joyful moments” across British shores, including: Unprecedented numbers of grey seals recorded in Cumbria. Record numbers of the iconic seabirds on a Welsh island. The initial discovery of a rare sea slug in a northern county, typically a southwestern species. A variable blenny found off the coast of Sussex for the first occasion. Not All Positive News The year had its low points, however. “The period was framed by marine incidents,” noted a conservation leader. “A major tanker collision in the North Sea and the release of plastic pollution off the southern coast were serious issues. Dedicated individuals are putting in immense work to defend and heal our marine habitats.”
Unprecedented observations of a remarkably clever cephalopod this past summer have resulted in the declaration of 2025 as the octopus's year in a yearly report of Britain’s seas. A Perfect Storm Driving a Surge An unusually warm winter coupled with an exceptionally warm spring triggered a massive influx of *Octopus vulgaris* to settle along the shores from Cornwall to Devon, spanning the Cornish and Devonian coasts. “The scale of the catch was roughly over a dozen times what we would normally expect in the waters around Cornwall,” commented a marine conservation officer. “Based on the totals, around 233 thousand octopuses were caught in British seas this year – that’s a huge increase from the norm.” *Octopus vulgaris* is native to British seas but ordinarily in such small numbers it is rarely seen. A population bloom is attributed to a combination of a mild winter and a warm breeding season. This perfect scenario meant increased juvenile survival, maybe aided by abundant stocks of other marine life seen in the area. An Uncommon Occurrence The most recent occasion, such an octopus proliferation this significant was observed in the mid-20th century, with archival data indicating the last bloom prior to that occurred in 1900. The remarkable abundance of octopuses meant they could be frequently seen in nearshore environments for a rare occurrence. Underwater recordings show octopuses congregating together – contrary to their normally lone nature – and ambulating along the ocean floor on the tips of their limbs. A curious octopus was even filmed grabbing a diver's camera. “During a first dive in that area this year I saw five octopuses,” the specialist continued. “They are large specimens. We have two species in these waters. One species is rather small, football-sized, but the *Octopus vulgaris* can be up to a metre and a half wide.” Looking Ahead & Coastal Highlights If conditions remain mild this coming winter suggests the potential a repeat event in 2026, because based on records, in similar situations, the blooms have repeated for two years in a row. “But, it's improbable, from previous blooms, that it will persist indefinitely,” they said. “Marine life is unpredictable currently so it’s hard to forecast.” The assessment also celebrated other “surprises, successes and joyful moments” across British shores, including: Unprecedented numbers of grey seals recorded in Cumbria. Record numbers of the iconic seabirds on a Welsh island. The initial discovery of a rare sea slug in a northern county, typically a southwestern species. A variable blenny found off the coast of Sussex for the first occasion. Not All Positive News The year had its low points, however. “The period was framed by marine incidents,” noted a conservation leader. “A major tanker collision in the North Sea and the release of plastic pollution off the southern coast were serious issues. Dedicated individuals are putting in immense work to defend and heal our marine habitats.”