🔗 Share this article 2025 Declared 'The Octopus Year' Off Britain's Southern Shores. Exceptionally high sightings of a remarkably clever cephalopod over the summer months have prompted the naming of 2025 as “the year of the octopus” in a yearly report of UK coastal waters. Ideal Conditions Leading to an Explosion An unusually warm winter coupled with a very warm springtime triggered a huge population of Mediterranean octopuses to take up residence along England’s south coast, spanning the Cornish and Devonian coasts. “The scale of the catch was approximately 13 times what we would typically see in Cornish waters,” explained a marine conservation officer. “Based on the totals, approximately 233,000 octopuses were found in British seas this year – which is a significant rise from what is typical.” The Mediterranean octopus is found in these waters but usually so scarce it is seldom observed. A population bloom is caused by the dual effect of a mild winter and favorable spring temperatures. This perfect scenario meant increased juvenile survival, possibly in part fuelled by large numbers of a favored prey species noted in recent years. A Rare Phenomenon The last time, a population surge of this scale comparable was documented in the 1950s, with past documentation 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. Diver videos show octopuses being sociable – unlike their typical solitary behavior – and ambulating along the seabed on the tips of their limbs. A curious octopus was even recorded reaching for submarine recording equipment. “The first time I dived off the Lizard peninsula this year I saw five of these creatures,” the officer added. “And these are big. We have two species in these waters. One species is quite small, the size of a ball, but the *Octopus vulgaris* can be reaching impressive sizes.” Future Prospects and Other Surprises A second gentle winter heading into next year suggests the potential another surge the following year, because in the past, with such patterns, populations have surged again for two years in a row. “But, it's improbable, looking at history, that it will become a permanent fixture,” they said. “The ocean is full of surprises at the moment so it’s hard to forecast.” The report also noted other “surprises, successes and joyful moments” around the UK coastline, including: Highest-ever counts of gray seals observed in one northern region. Exceptional populations of puffins on Skomer. A first-ever sighting of a rare sea slug in a northern county, normally residing farther south. A variable blenny found off the coast of Sussex for the first occasion. A Note of Caution Not everything was good news, however. “The year was bookended by environmental disasters,” 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. Staff and volunteers are putting in immense work to protect and restore our shorelines.”
Exceptionally high sightings of a remarkably clever cephalopod over the summer months have prompted the naming of 2025 as “the year of the octopus” in a yearly report of UK coastal waters. Ideal Conditions Leading to an Explosion An unusually warm winter coupled with a very warm springtime triggered a huge population of Mediterranean octopuses to take up residence along England’s south coast, spanning the Cornish and Devonian coasts. “The scale of the catch was approximately 13 times what we would typically see in Cornish waters,” explained a marine conservation officer. “Based on the totals, approximately 233,000 octopuses were found in British seas this year – which is a significant rise from what is typical.” The Mediterranean octopus is found in these waters but usually so scarce it is seldom observed. A population bloom is caused by the dual effect of a mild winter and favorable spring temperatures. This perfect scenario meant increased juvenile survival, possibly in part fuelled by large numbers of a favored prey species noted in recent years. A Rare Phenomenon The last time, a population surge of this scale comparable was documented in the 1950s, with past documentation 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. Diver videos show octopuses being sociable – unlike their typical solitary behavior – and ambulating along the seabed on the tips of their limbs. A curious octopus was even recorded reaching for submarine recording equipment. “The first time I dived off the Lizard peninsula this year I saw five of these creatures,” the officer added. “And these are big. We have two species in these waters. One species is quite small, the size of a ball, but the *Octopus vulgaris* can be reaching impressive sizes.” Future Prospects and Other Surprises A second gentle winter heading into next year suggests the potential another surge the following year, because in the past, with such patterns, populations have surged again for two years in a row. “But, it's improbable, looking at history, that it will become a permanent fixture,” they said. “The ocean is full of surprises at the moment so it’s hard to forecast.” The report also noted other “surprises, successes and joyful moments” around the UK coastline, including: Highest-ever counts of gray seals observed in one northern region. Exceptional populations of puffins on Skomer. A first-ever sighting of a rare sea slug in a northern county, normally residing farther south. A variable blenny found off the coast of Sussex for the first occasion. A Note of Caution Not everything was good news, however. “The year was bookended by environmental disasters,” 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. Staff and volunteers are putting in immense work to protect and restore our shorelines.”