🔗 Share this article 2025 Hailed as The Year for Octopuses Off England's South Coast. Record-breaking sightings of one of the world's most intelligent invertebrates this past summer have led to the declaration of 2025 as “the year of the octopus” in a yearly report of the nation's marine environment. A Confluence of Factors Driving a Surge A mild winter coupled with a remarkably hot spring triggered a massive influx of common octopuses (*Octopus vulgaris*) to establish themselves along the shores from Cornwall to Devon, across the southwestern peninsula. “The reported landings was of the order of about over a dozen times what we would usually anticipate in Cornish waters,” stated a marine life specialist. “When we added up the numbers, nearly a quarter of a million octopuses were found in UK waters this year – that’s a huge increase from what is typical.” The common octopus is native to UK waters but ordinarily in such small numbers it is rarely seen. An explosive growth is caused by the dual effect of a mild winter and favorable spring temperatures. These ideal conditions meant a higher survival rate for young, possibly in part fuelled by significant populations of a favored prey species noted in recent years. A Historic Event The most recent occasion, an octopus bloom of this size was documented in the mid-20th century, with archival data indicating the one before that happened in the turn of the 20th century. The remarkable abundance of octopuses meant they could be frequently seen in shallow waters for the first time in recent history. Diver videos show octopuses congregating together – contrary to their normally lone nature – and moving along the bottom on the tips of their limbs. One creature was even seen investigating submarine recording equipment. “On my initial dive there this year I saw five octopuses,” the officer added. “And these are big. We have two species in UK waters. The curled octopus is quite small, football-sized, but the *Octopus vulgaris* can be reaching impressive sizes.” Future Prospects and Other Surprises Another mild winter this coming winter suggests the potential another surge next year, because in the past, with such patterns, events have occurred consecutively for two years in a row. “Still, the chances are low, from previous blooms, that it will persist indefinitely,” they said. “The ocean is full of surprises at the moment so it’s quite an unpredictable situation.” The annual review also noted additional positive marine news across British shores, including: A record number of gray seals recorded in one northern region. Record numbers of the iconic seabirds on a Welsh island. A first-ever sighting of the *Capellinia fustifera* nudibranch in a northern county, usually found in the south-west. A Mediterranean fish species found off the coast of Sussex for the first occasion. Environmental Concerns Not everything was good news, however. “The period was framed by environmental disasters,” said a head of marine conservation. “A significant shipping incident in the North Sea and a spill of industrial pellets off the southern coast highlighted ongoing threats. Staff and volunteers are making huge efforts to defend and heal our coasts.”
Record-breaking sightings of one of the world's most intelligent invertebrates this past summer have led to the declaration of 2025 as “the year of the octopus” in a yearly report of the nation's marine environment. A Confluence of Factors Driving a Surge A mild winter coupled with a remarkably hot spring triggered a massive influx of common octopuses (*Octopus vulgaris*) to establish themselves along the shores from Cornwall to Devon, across the southwestern peninsula. “The reported landings was of the order of about over a dozen times what we would usually anticipate in Cornish waters,” stated a marine life specialist. “When we added up the numbers, nearly a quarter of a million octopuses were found in UK waters this year – that’s a huge increase from what is typical.” The common octopus is native to UK waters but ordinarily in such small numbers it is rarely seen. An explosive growth is caused by the dual effect of a mild winter and favorable spring temperatures. These ideal conditions meant a higher survival rate for young, possibly in part fuelled by significant populations of a favored prey species noted in recent years. A Historic Event The most recent occasion, an octopus bloom of this size was documented in the mid-20th century, with archival data indicating the one before that happened in the turn of the 20th century. The remarkable abundance of octopuses meant they could be frequently seen in shallow waters for the first time in recent history. Diver videos show octopuses congregating together – contrary to their normally lone nature – and moving along the bottom on the tips of their limbs. One creature was even seen investigating submarine recording equipment. “On my initial dive there this year I saw five octopuses,” the officer added. “And these are big. We have two species in UK waters. The curled octopus is quite small, football-sized, but the *Octopus vulgaris* can be reaching impressive sizes.” Future Prospects and Other Surprises Another mild winter this coming winter suggests the potential another surge next year, because in the past, with such patterns, events have occurred consecutively for two years in a row. “Still, the chances are low, from previous blooms, that it will persist indefinitely,” they said. “The ocean is full of surprises at the moment so it’s quite an unpredictable situation.” The annual review also noted additional positive marine news across British shores, including: A record number of gray seals recorded in one northern region. Record numbers of the iconic seabirds on a Welsh island. A first-ever sighting of the *Capellinia fustifera* nudibranch in a northern county, usually found in the south-west. A Mediterranean fish species found off the coast of Sussex for the first occasion. Environmental Concerns Not everything was good news, however. “The period was framed by environmental disasters,” said a head of marine conservation. “A significant shipping incident in the North Sea and a spill of industrial pellets off the southern coast highlighted ongoing threats. Staff and volunteers are making huge efforts to defend and heal our coasts.”