🔗 Share this article 2025 Hailed as the 'Year of the Octopus' Along Britain's Southern Shores. Record-breaking observations of one of the world's most intelligent invertebrates this past summer have led to the declaration of 2025 as the year for octopuses in a yearly report of Britain’s seas. A Perfect Storm Leading to an Explosion A gentle winter coupled with a very warm springtime triggered a huge population of common octopuses (*Octopus vulgaris*) to settle along the southern coastline of England, across the southwestern peninsula. “The scale of the catch was of the order of about over a dozen times what we would normally expect in Cornish waters,” commented a marine life specialist. “Based on the totals, approximately 233,000 octopuses were caught in these waters this year – which is a significant rise from the norm.” *Octopus vulgaris* is indigenous to British seas but usually so scarce it is rarely seen. An explosive growth is the result of the dual effect of gentle winter conditions and a warm breeding season. These ideal conditions meant increased juvenile survival, possibly in part fuelled by large numbers of spider crabs also recorded. A Historic Event Previously, an octopus bloom comparable was observed in the 1950s, with archival data indicating the last bloom prior to that was in the turn of the 20th century. The remarkable abundance of octopuses meant they could be readily observed in shallow waters for the first time in recent history. Underwater recordings show octopuses congregating together – unlike their typical solitary behavior – and moving along the seabed on their tentacle tips. One individual was even seen investigating submarine recording equipment. “On my initial dive there this year I saw multiple octopuses,” they noted. “And these are big. We have two species in the region. One species is smaller, the size of a ball, but the *Octopus vulgaris* can be reaching impressive sizes.” Looking Ahead & Coastal Highlights A second gentle winter this coming winter suggests the potential another surge next year, because in the past, in similar situations, populations have surged again for two consecutive years. “Still, the chances are low, looking at history, that it will become a permanent fixture,” they stated. “But the sea keeps giving us surprises currently so it’s hard to forecast.” The report also noted other “surprises, successes and joyful moments” across British shores, including: Unprecedented numbers of grey seals seen in one northern region. Exceptional populations of puffins on Skomer. A first-ever sighting of an unusual mollusc in a northern county, normally residing farther south. A variable blenny spotted off the coast of Sussex for the inaugural time. Not All Positive News 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 plastic pollution off the southern coast highlighted ongoing threats. Dedicated individuals are working tirelessly to safeguard and rehabilitate our coasts.”
Record-breaking observations of one of the world's most intelligent invertebrates this past summer have led to the declaration of 2025 as the year for octopuses in a yearly report of Britain’s seas. A Perfect Storm Leading to an Explosion A gentle winter coupled with a very warm springtime triggered a huge population of common octopuses (*Octopus vulgaris*) to settle along the southern coastline of England, across the southwestern peninsula. “The scale of the catch was of the order of about over a dozen times what we would normally expect in Cornish waters,” commented a marine life specialist. “Based on the totals, approximately 233,000 octopuses were caught in these waters this year – which is a significant rise from the norm.” *Octopus vulgaris* is indigenous to British seas but usually so scarce it is rarely seen. An explosive growth is the result of the dual effect of gentle winter conditions and a warm breeding season. These ideal conditions meant increased juvenile survival, possibly in part fuelled by large numbers of spider crabs also recorded. A Historic Event Previously, an octopus bloom comparable was observed in the 1950s, with archival data indicating the last bloom prior to that was in the turn of the 20th century. The remarkable abundance of octopuses meant they could be readily observed in shallow waters for the first time in recent history. Underwater recordings show octopuses congregating together – unlike their typical solitary behavior – and moving along the seabed on their tentacle tips. One individual was even seen investigating submarine recording equipment. “On my initial dive there this year I saw multiple octopuses,” they noted. “And these are big. We have two species in the region. One species is smaller, the size of a ball, but the *Octopus vulgaris* can be reaching impressive sizes.” Looking Ahead & Coastal Highlights A second gentle winter this coming winter suggests the potential another surge next year, because in the past, in similar situations, populations have surged again for two consecutive years. “Still, the chances are low, looking at history, that it will become a permanent fixture,” they stated. “But the sea keeps giving us surprises currently so it’s hard to forecast.” The report also noted other “surprises, successes and joyful moments” across British shores, including: Unprecedented numbers of grey seals seen in one northern region. Exceptional populations of puffins on Skomer. A first-ever sighting of an unusual mollusc in a northern county, normally residing farther south. A variable blenny spotted off the coast of Sussex for the inaugural time. Not All Positive News 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 plastic pollution off the southern coast highlighted ongoing threats. Dedicated individuals are working tirelessly to safeguard and rehabilitate our coasts.”