🔗 Share this article 2025 Proclaimed The Year for Octopuses Along England's Southern Shores. Exceptionally high observations of one of the world's most intelligent invertebrates this past summer have led to the designation of 2025 as the octopus's year in a yearly report of Britain’s seas. A Confluence of Factors Leading to an Explosion A gentle winter coupled with a remarkably hot spring catalyzed a huge population of common octopuses (*Octopus vulgaris*) to take up residence along the shores from Cornwall to Devon, from Penzance in Cornwall to south Devon. “The scale of the catch was of the order of about thirteen times what we would normally expect in this region,” commented an ocean conservation expert. “Calculating the figures, around 233 thousand octopuses were caught in British seas this year – that’s a huge increase from historical averages.” *Octopus vulgaris* is native to British seas but usually so scarce it is infrequently encountered. An explosive growth is the result of a combination of gentle winter conditions and a warm breeding season. This perfect scenario meant increased juvenile survival, possibly in part fuelled by significant populations of other marine life also recorded. A Rare Phenomenon The most recent occasion, a population surge of this scale of this size was recorded in the mid-20th century, with historical records indicating the one before that occurred in the turn of the 20th century. The huge numbers of octopuses meant they could be easily spotted in nearshore environments for the first time in recent history. Underwater recordings show octopuses being sociable – contrary to their normally lone nature – and ambulating along the ocean floor on their tentacle tips. A curious octopus was even recorded reaching for an underwater camera. “The first time I dived in that area this year I saw multiple octopuses,” they noted. “They are sizeable. There are two types in these waters. The curled octopus is rather small, the size of a ball, but these newcomers can be reaching impressive sizes.” Predictions and Marine Joy A second gentle winter this coming winter could lead to another surge next year, because historically, under these conditions, the blooms have repeated for two years in a row. “However, it is unlikely, looking at history, that it will become a permanent fixture,” they said. “The ocean is full of surprises currently so it’s a very uncertain scenario.” The report also celebrated further encouraging coastal sightings along the coast, including: A record number of grey seals observed in Cumbria. Record numbers of the iconic seabirds on an island off Wales. The first recording of the *Capellinia fustifera* nudibranch in Yorkshire, normally residing farther south. A type of blenny discovered 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 industrial pellets off the Sussex coast highlighted ongoing threats. Staff and volunteers are working tirelessly to protect and restore our marine habitats.”
Exceptionally high observations of one of the world's most intelligent invertebrates this past summer have led to the designation of 2025 as the octopus's year in a yearly report of Britain’s seas. A Confluence of Factors Leading to an Explosion A gentle winter coupled with a remarkably hot spring catalyzed a huge population of common octopuses (*Octopus vulgaris*) to take up residence along the shores from Cornwall to Devon, from Penzance in Cornwall to south Devon. “The scale of the catch was of the order of about thirteen times what we would normally expect in this region,” commented an ocean conservation expert. “Calculating the figures, around 233 thousand octopuses were caught in British seas this year – that’s a huge increase from historical averages.” *Octopus vulgaris* is native to British seas but usually so scarce it is infrequently encountered. An explosive growth is the result of a combination of gentle winter conditions and a warm breeding season. This perfect scenario meant increased juvenile survival, possibly in part fuelled by significant populations of other marine life also recorded. A Rare Phenomenon The most recent occasion, a population surge of this scale of this size was recorded in the mid-20th century, with historical records indicating the one before that occurred in the turn of the 20th century. The huge numbers of octopuses meant they could be easily spotted in nearshore environments for the first time in recent history. Underwater recordings show octopuses being sociable – contrary to their normally lone nature – and ambulating along the ocean floor on their tentacle tips. A curious octopus was even recorded reaching for an underwater camera. “The first time I dived in that area this year I saw multiple octopuses,” they noted. “They are sizeable. There are two types in these waters. The curled octopus is rather small, the size of a ball, but these newcomers can be reaching impressive sizes.” Predictions and Marine Joy A second gentle winter this coming winter could lead to another surge next year, because historically, under these conditions, the blooms have repeated for two years in a row. “However, it is unlikely, looking at history, that it will become a permanent fixture,” they said. “The ocean is full of surprises currently so it’s a very uncertain scenario.” The report also celebrated further encouraging coastal sightings along the coast, including: A record number of grey seals observed in Cumbria. Record numbers of the iconic seabirds on an island off Wales. The first recording of the *Capellinia fustifera* nudibranch in Yorkshire, normally residing farther south. A type of blenny discovered 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 industrial pellets off the Sussex coast highlighted ongoing threats. Staff and volunteers are working tirelessly to protect and restore our marine habitats.”