🔗 Share this article 2025 Proclaimed The Year for Octopuses Off England's South Coast. Unprecedented encounters of one of the world's most intelligent invertebrates over the summer months have prompted the declaration of 2025 as the octopus's year in an annual review of UK coastal waters. A Perfect Storm Driving a Surge A mild winter coupled with a remarkably hot spring triggered unprecedented numbers of *Octopus vulgaris* to take up residence along the southern coastline of England, spanning the Cornish and Devonian coasts. “The volume of octopuses caught was roughly over a dozen times what we would typically see in the waters around Cornwall,” stated a marine conservation officer. “Calculating the figures, nearly a quarter of a million octopuses were found in UK waters this year – that’s a huge increase from the norm.” The Mediterranean octopus is indigenous to UK waters but ordinarily in such small numbers it is infrequently encountered. A population bloom is the result of a combination of a mild winter and favorable spring temperatures. These ideal conditions meant increased juvenile survival, maybe aided by large numbers of a favored prey species also recorded. A Historic Event The last time, an octopus bloom this significant was recorded in 1950, with archival data indicating the one before that happened in 1900. The huge numbers of octopuses meant they could be easily spotted in coastal areas for the first time in recent history. Video footage show octopuses congregating together – they are usually solitary – and ambulating along the ocean floor on the tips of their limbs. One individual was even seen investigating an underwater camera. “During a first dive in that area this year I saw five octopuses,” the specialist continued. “And these are big. Two kinds exist in these waters. The curled octopus is rather small, about the size of a football, but these common octopuses can be reaching impressive sizes.” Future Prospects and Other Surprises Another mild winter heading into next year suggests the potential a repeat event next year, because historically, with such patterns, events have occurred consecutively for two years running. “Still, the chances are low, based on past events, that it will persist indefinitely,” they said. “Marine life is unpredictable currently so it’s a very uncertain scenario.” The assessment also highlighted further encouraging coastal sightings across British shores, including: Highest-ever counts of gray seals seen in Cumbria. Peak numbers of the iconic seabirds on a Welsh island. The initial discovery of the *Capellinia fustifera* nudibranch in a northern county, usually found in the south-west. A Mediterranean fish species discovered off the coast of Sussex 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 an accidental discharge of tonnes of plastic biobeads off the Sussex coast were serious issues. Dedicated individuals are making huge efforts to protect and restore our marine habitats.”
Unprecedented encounters of one of the world's most intelligent invertebrates over the summer months have prompted the declaration of 2025 as the octopus's year in an annual review of UK coastal waters. A Perfect Storm Driving a Surge A mild winter coupled with a remarkably hot spring triggered unprecedented numbers of *Octopus vulgaris* to take up residence along the southern coastline of England, spanning the Cornish and Devonian coasts. “The volume of octopuses caught was roughly over a dozen times what we would typically see in the waters around Cornwall,” stated a marine conservation officer. “Calculating the figures, nearly a quarter of a million octopuses were found in UK waters this year – that’s a huge increase from the norm.” The Mediterranean octopus is indigenous to UK waters but ordinarily in such small numbers it is infrequently encountered. A population bloom is the result of a combination of a mild winter and favorable spring temperatures. These ideal conditions meant increased juvenile survival, maybe aided by large numbers of a favored prey species also recorded. A Historic Event The last time, an octopus bloom this significant was recorded in 1950, with archival data indicating the one before that happened in 1900. The huge numbers of octopuses meant they could be easily spotted in coastal areas for the first time in recent history. Video footage show octopuses congregating together – they are usually solitary – and ambulating along the ocean floor on the tips of their limbs. One individual was even seen investigating an underwater camera. “During a first dive in that area this year I saw five octopuses,” the specialist continued. “And these are big. Two kinds exist in these waters. The curled octopus is rather small, about the size of a football, but these common octopuses can be reaching impressive sizes.” Future Prospects and Other Surprises Another mild winter heading into next year suggests the potential a repeat event next year, because historically, with such patterns, events have occurred consecutively for two years running. “Still, the chances are low, based on past events, that it will persist indefinitely,” they said. “Marine life is unpredictable currently so it’s a very uncertain scenario.” The assessment also highlighted further encouraging coastal sightings across British shores, including: Highest-ever counts of gray seals seen in Cumbria. Peak numbers of the iconic seabirds on a Welsh island. The initial discovery of the *Capellinia fustifera* nudibranch in a northern county, usually found in the south-west. A Mediterranean fish species discovered off the coast of Sussex 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 an accidental discharge of tonnes of plastic biobeads off the Sussex coast were serious issues. Dedicated individuals are making huge efforts to protect and restore our marine habitats.”