🔗 Share this article 2025 Hailed as 'The Octopus Year' Off England's South Coast. Unprecedented observations of one of the world's most intelligent invertebrates over the summer months have led to the designation of 2025 as the octopus's year in a seasonal assessment of Britain’s seas. A Perfect Storm for a Population Boom A gentle winter and then an exceptionally warm spring prompted unprecedented numbers of *Octopus vulgaris* to establish themselves along the shores from Cornwall to Devon, spanning the Cornish and Devonian coasts. “The volume of octopuses caught was of the order of about thirteen times what we would usually anticipate in this region,” stated an ocean conservation expert. “Calculating the figures, approximately 233,000 octopuses were present in these waters this year – representing a massive jump from historical averages.” The common octopus is found in these waters but typically so rare it is rarely seen. A population bloom is attributed to a combination of a mild winter and a warm breeding season. These ideal conditions meant increased juvenile survival, maybe aided by abundant stocks of other marine life seen in the area. A Historic Event The last time, such an octopus proliferation of this size was recorded in 1950, with historical records indicating the last bloom prior to that happened in 1900. The remarkable abundance of octopuses meant they could be readily observed in coastal areas for the first time in recent history. Underwater recordings show octopuses gathering in groups – they are usually solitary – and “walking” along the ocean floor on their arm ends. A curious octopus was even filmed grabbing an underwater camera. “The first time I dived off the Lizard peninsula this year I saw five of these creatures,” they noted. “They are sizeable. Two kinds exist in the region. The curled octopus is smaller, about the size of a football, but these newcomers can be reaching impressive sizes.” Looking Ahead & Coastal Highlights Another mild winter this coming winter meant it was possible a second bloom next year, because in the past, in similar situations, the blooms have repeated for two consecutive years. “Still, the chances are low, based on past events, that it will become a permanent fixture,” they stated. “But the sea keeps giving us surprises at the moment so it’s hard to forecast.” The assessment also highlighted further encouraging coastal sightings across British shores, including: A record number of gray seals seen in Cumbria. Exceptional populations of the iconic seabirds on an island off Wales. The first recording of a rare sea slug in Yorkshire, usually found in the south-west. A variable blenny discovered off the coast of Sussex for the inaugural time. A Note of Caution Challenges were also present, however. “The year was bookended by marine incidents,” said a head of marine conservation. “A major tanker collision in the North Sea and a spill of industrial pellets off the southern coast highlighted ongoing threats. Dedicated individuals are working tirelessly to safeguard and rehabilitate our shorelines.”
Unprecedented observations of one of the world's most intelligent invertebrates over the summer months have led to the designation of 2025 as the octopus's year in a seasonal assessment of Britain’s seas. A Perfect Storm for a Population Boom A gentle winter and then an exceptionally warm spring prompted unprecedented numbers of *Octopus vulgaris* to establish themselves along the shores from Cornwall to Devon, spanning the Cornish and Devonian coasts. “The volume of octopuses caught was of the order of about thirteen times what we would usually anticipate in this region,” stated an ocean conservation expert. “Calculating the figures, approximately 233,000 octopuses were present in these waters this year – representing a massive jump from historical averages.” The common octopus is found in these waters but typically so rare it is rarely seen. A population bloom is attributed to a combination of a mild winter and a warm breeding season. These ideal conditions meant increased juvenile survival, maybe aided by abundant stocks of other marine life seen in the area. A Historic Event The last time, such an octopus proliferation of this size was recorded in 1950, with historical records indicating the last bloom prior to that happened in 1900. The remarkable abundance of octopuses meant they could be readily observed in coastal areas for the first time in recent history. Underwater recordings show octopuses gathering in groups – they are usually solitary – and “walking” along the ocean floor on their arm ends. A curious octopus was even filmed grabbing an underwater camera. “The first time I dived off the Lizard peninsula this year I saw five of these creatures,” they noted. “They are sizeable. Two kinds exist in the region. The curled octopus is smaller, about the size of a football, but these newcomers can be reaching impressive sizes.” Looking Ahead & Coastal Highlights Another mild winter this coming winter meant it was possible a second bloom next year, because in the past, in similar situations, the blooms have repeated for two consecutive years. “Still, the chances are low, based on past events, that it will become a permanent fixture,” they stated. “But the sea keeps giving us surprises at the moment so it’s hard to forecast.” The assessment also highlighted further encouraging coastal sightings across British shores, including: A record number of gray seals seen in Cumbria. Exceptional populations of the iconic seabirds on an island off Wales. The first recording of a rare sea slug in Yorkshire, usually found in the south-west. A variable blenny discovered off the coast of Sussex for the inaugural time. A Note of Caution Challenges were also present, however. “The year was bookended by marine incidents,” said a head of marine conservation. “A major tanker collision in the North Sea and a spill of industrial pellets off the southern coast highlighted ongoing threats. Dedicated individuals are working tirelessly to safeguard and rehabilitate our shorelines.”