🔗 Share this article 2025 Proclaimed The Year for Octopuses Off Britain's Southern Shores. Exceptionally high sightings of a supremely intelligent sea creature during the summer season have resulted in the designation of 2025 as “the year of the octopus” 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 a massive influx of Mediterranean octopuses to take up residence along the shores from Cornwall to Devon, across the southwestern peninsula. “The scale of the catch was of the order of about 13 times what we would normally expect in Cornish waters,” commented a marine conservation officer. “Calculating the figures, nearly a quarter of a million octopuses were caught in British seas this year – representing a massive jump from what is typical.” The common octopus is indigenous to these waters but ordinarily in such small numbers it is infrequently encountered. A population bloom is the result of a combination of gentle winter conditions and favorable spring temperatures. Such favorable circumstances meant more larvae, possibly in part fuelled by significant populations of other marine life also recorded. A Historic Event Previously, such an octopus proliferation this significant was recorded in the mid-20th century, with past documentation indicating the last bloom prior to that happened in the turn of the 20th century. The remarkable abundance of octopuses meant they could be frequently seen in shallow waters for the first time in living memory. Video footage show octopuses congregating together – they are usually solitary – and ambulating along the seabed on their tentacle tips. One creature was even seen investigating a diver's camera. “The first time I dived in that area this year I saw multiple octopuses,” the specialist continued. “They are large specimens. There are two types in UK waters. The curled octopus is rather small, football-sized, but these common octopuses can be reaching impressive sizes.” Future Prospects and Other Surprises Another mild winter going into 2026 could lead to a second bloom the following year, because in the past, with such patterns, events have occurred consecutively for two consecutive years. “However, it is unlikely, looking at history, that it will go on for a long time,” they said. “But the sea keeps giving us surprises these days so it’s hard to forecast.” The assessment also noted further encouraging coastal sightings along the coast, including: A record number of grey seals recorded in Cumbria. Peak numbers of puffins on Skomer. The first recording of the *Capellinia fustifera* nudibranch in a northern county, normally residing farther south. A variable blenny spotted off the coast of a southern county for the first occasion. Not All Positive News The year had its low points, however. “The year was bookended by ecological challenges,” stated an expert. “A major tanker collision in March and the release of industrial pellets off the Sussex coast served as stark reminders. Staff and volunteers are making huge efforts to safeguard and rehabilitate our shorelines.”
Exceptionally high sightings of a supremely intelligent sea creature during the summer season have resulted in the designation of 2025 as “the year of the octopus” 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 a massive influx of Mediterranean octopuses to take up residence along the shores from Cornwall to Devon, across the southwestern peninsula. “The scale of the catch was of the order of about 13 times what we would normally expect in Cornish waters,” commented a marine conservation officer. “Calculating the figures, nearly a quarter of a million octopuses were caught in British seas this year – representing a massive jump from what is typical.” The common octopus is indigenous to these waters but ordinarily in such small numbers it is infrequently encountered. A population bloom is the result of a combination of gentle winter conditions and favorable spring temperatures. Such favorable circumstances meant more larvae, possibly in part fuelled by significant populations of other marine life also recorded. A Historic Event Previously, such an octopus proliferation this significant was recorded in the mid-20th century, with past documentation indicating the last bloom prior to that happened in the turn of the 20th century. The remarkable abundance of octopuses meant they could be frequently seen in shallow waters for the first time in living memory. Video footage show octopuses congregating together – they are usually solitary – and ambulating along the seabed on their tentacle tips. One creature was even seen investigating a diver's camera. “The first time I dived in that area this year I saw multiple octopuses,” the specialist continued. “They are large specimens. There are two types in UK waters. The curled octopus is rather small, football-sized, but these common octopuses can be reaching impressive sizes.” Future Prospects and Other Surprises Another mild winter going into 2026 could lead to a second bloom the following year, because in the past, with such patterns, events have occurred consecutively for two consecutive years. “However, it is unlikely, looking at history, that it will go on for a long time,” they said. “But the sea keeps giving us surprises these days so it’s hard to forecast.” The assessment also noted further encouraging coastal sightings along the coast, including: A record number of grey seals recorded in Cumbria. Peak numbers of puffins on Skomer. The first recording of the *Capellinia fustifera* nudibranch in a northern county, normally residing farther south. A variable blenny spotted off the coast of a southern county for the first occasion. Not All Positive News The year had its low points, however. “The year was bookended by ecological challenges,” stated an expert. “A major tanker collision in March and the release of industrial pellets off the Sussex coast served as stark reminders. Staff and volunteers are making huge efforts to safeguard and rehabilitate our shorelines.”