🔗 Share this article 2025 Proclaimed The Year for Octopuses Off Britain's Southern Shores. Record-breaking observations of a supremely intelligent sea creature during the summer season have resulted in the declaration of 2025 as the year for octopuses in an annual review of UK coastal waters. A Perfect Storm Leading to an Explosion A gentle winter coupled with a remarkably hot spring catalyzed unprecedented numbers of common octopuses (*Octopus vulgaris*) to settle along England’s south coast, from Penzance in Cornwall to south Devon. “The reported landings was of the order of about over a dozen times what we would normally expect in Cornish waters,” explained a marine life specialist. “When we added up the numbers, nearly a quarter of a million octopuses were found in British seas this year – representing a massive jump from historical averages.” *Octopus vulgaris* is found in UK waters but usually so scarce it is infrequently encountered. A population bloom is attributed to a combination of gentle winter conditions and favorable spring temperatures. This perfect scenario meant increased juvenile survival, potentially supported by abundant stocks of other marine life noted in recent years. An Uncommon Occurrence Previously, such an octopus proliferation comparable was recorded in 1950, with historical records indicating the previous major event happened in 1900. The sheer quantity of octopuses meant they could be easily spotted in shallow waters for a rare occurrence. Video footage show octopuses being sociable – unlike their typical solitary behavior – and “walking” along the ocean floor on the tips of their limbs. One individual was even filmed grabbing a diver's camera. “During a first dive in that area this year I saw five of these creatures,” the officer added. “And these are big. There are two types in UK waters. The curled octopus is smaller, football-sized, but these common octopuses can be reaching impressive sizes.” Future Prospects and Other Surprises A second gentle winter going into 2026 meant it was possible a repeat event the following year, because in the past, under these conditions, the blooms have repeated for two years running. “However, it is unlikely, based on past events, that it will become a permanent fixture,” they cautioned. “Marine life is unpredictable at the moment so it’s a very uncertain scenario.” The report also celebrated additional positive marine news across British shores, including: A record number of grey seals seen in Cumbria. Peak numbers of puffins on a Welsh island. A first-ever sighting of an unusual mollusc in Yorkshire, typically a southwestern species. A variable blenny discovered off the coast of a southern county for the inaugural time. Not All Positive News The year had its low points, however. “The year was bookended by environmental disasters,” said a head of marine conservation. “A significant shipping incident in March and an accidental discharge of tonnes of plastic biobeads off the southern coast served as stark reminders. Conservation teams are working tirelessly to safeguard and rehabilitate our coasts.”
Record-breaking observations of a supremely intelligent sea creature during the summer season have resulted in the declaration of 2025 as the year for octopuses in an annual review of UK coastal waters. A Perfect Storm Leading to an Explosion A gentle winter coupled with a remarkably hot spring catalyzed unprecedented numbers of common octopuses (*Octopus vulgaris*) to settle along England’s south coast, from Penzance in Cornwall to south Devon. “The reported landings was of the order of about over a dozen times what we would normally expect in Cornish waters,” explained a marine life specialist. “When we added up the numbers, nearly a quarter of a million octopuses were found in British seas this year – representing a massive jump from historical averages.” *Octopus vulgaris* is found in UK waters but usually so scarce it is infrequently encountered. A population bloom is attributed to a combination of gentle winter conditions and favorable spring temperatures. This perfect scenario meant increased juvenile survival, potentially supported by abundant stocks of other marine life noted in recent years. An Uncommon Occurrence Previously, such an octopus proliferation comparable was recorded in 1950, with historical records indicating the previous major event happened in 1900. The sheer quantity of octopuses meant they could be easily spotted in shallow waters for a rare occurrence. Video footage show octopuses being sociable – unlike their typical solitary behavior – and “walking” along the ocean floor on the tips of their limbs. One individual was even filmed grabbing a diver's camera. “During a first dive in that area this year I saw five of these creatures,” the officer added. “And these are big. There are two types in UK waters. The curled octopus is smaller, football-sized, but these common octopuses can be reaching impressive sizes.” Future Prospects and Other Surprises A second gentle winter going into 2026 meant it was possible a repeat event the following year, because in the past, under these conditions, the blooms have repeated for two years running. “However, it is unlikely, based on past events, that it will become a permanent fixture,” they cautioned. “Marine life is unpredictable at the moment so it’s a very uncertain scenario.” The report also celebrated additional positive marine news across British shores, including: A record number of grey seals seen in Cumbria. Peak numbers of puffins on a Welsh island. A first-ever sighting of an unusual mollusc in Yorkshire, typically a southwestern species. A variable blenny discovered off the coast of a southern county for the inaugural time. Not All Positive News The year had its low points, however. “The year was bookended by environmental disasters,” said a head of marine conservation. “A significant shipping incident in March and an accidental discharge of tonnes of plastic biobeads off the southern coast served as stark reminders. Conservation teams are working tirelessly to safeguard and rehabilitate our coasts.”