🔗 Share this article 2025 Proclaimed The Year for Octopuses Off England's South Coast. Unprecedented encounters of a supremely intelligent sea creature during the summer season have led to the naming of 2025 as “the year of the octopus” in an annual review of Britain’s seas. Ideal Conditions Leading to an Explosion A gentle winter coupled with a remarkably hot spring catalyzed a massive influx of Mediterranean octopuses to settle along the southern coastline of England, across the southwestern peninsula. “The volume of octopuses caught was approximately over a dozen times what we would typically see in Cornish waters,” commented a marine conservation officer. “When we added up the numbers, approximately 233,000 octopuses were caught in UK waters this year – which is a significant rise from what is typical.” The Mediterranean octopus is found in these waters but typically so rare it is seldom observed. A population bloom is caused by a combination of gentle winter conditions and a warm breeding season. These ideal conditions meant a higher survival rate for young, potentially supported by abundant stocks of spider crabs noted in recent years. An Uncommon Occurrence Previously, such an octopus proliferation of this size was recorded in the mid-20th century, with archival data indicating the last bloom prior to that was in 1900. The sheer quantity of octopuses meant they could be frequently seen in shallow waters for the first time in recent history. Underwater recordings show octopuses gathering in groups – they are usually solitary – and moving along the bottom on their tentacle tips. A curious octopus was even recorded reaching for an underwater camera. “During a first dive off the Lizard peninsula this year I saw five octopuses,” they noted. “They are sizeable. We have two species in these waters. The curled octopus is smaller, about the size of a football, but these newcomers can be up to a metre and a half wide.” Predictions and Marine Joy If conditions remain mild this coming winter could lead to a second bloom next year, because based on records, under these conditions, the blooms have repeated for two years in a row. “Still, the chances are low, based on past events, that it will go on for a long time,” they said. “But the sea keeps giving us surprises currently so it’s hard to forecast.” The annual review also highlighted further encouraging coastal sightings across British shores, including: Unprecedented numbers of grey seals seen in Cumbria. Peak numbers of puffins on an island off Wales. The initial discovery of the *Capellinia fustifera* nudibranch in a northern county, usually found in the south-west. A Mediterranean fish species spotted off the coast of a southern county for the first time. Not All Positive News Challenges were also present, however. “The period was framed by ecological challenges,” noted a conservation leader. “A significant shipping incident in the North Sea and the release of industrial pellets off the Sussex coast were serious issues. Staff and volunteers are putting in immense work to defend and heal our marine habitats.”
Unprecedented encounters of a supremely intelligent sea creature during the summer season have led to the naming of 2025 as “the year of the octopus” in an annual review of Britain’s seas. Ideal Conditions Leading to an Explosion A gentle winter coupled with a remarkably hot spring catalyzed a massive influx of Mediterranean octopuses to settle along the southern coastline of England, across the southwestern peninsula. “The volume of octopuses caught was approximately over a dozen times what we would typically see in Cornish waters,” commented a marine conservation officer. “When we added up the numbers, approximately 233,000 octopuses were caught in UK waters this year – which is a significant rise from what is typical.” The Mediterranean octopus is found in these waters but typically so rare it is seldom observed. A population bloom is caused by a combination of gentle winter conditions and a warm breeding season. These ideal conditions meant a higher survival rate for young, potentially supported by abundant stocks of spider crabs noted in recent years. An Uncommon Occurrence Previously, such an octopus proliferation of this size was recorded in the mid-20th century, with archival data indicating the last bloom prior to that was in 1900. The sheer quantity of octopuses meant they could be frequently seen in shallow waters for the first time in recent history. Underwater recordings show octopuses gathering in groups – they are usually solitary – and moving along the bottom on their tentacle tips. A curious octopus was even recorded reaching for an underwater camera. “During a first dive off the Lizard peninsula this year I saw five octopuses,” they noted. “They are sizeable. We have two species in these waters. The curled octopus is smaller, about the size of a football, but these newcomers can be up to a metre and a half wide.” Predictions and Marine Joy If conditions remain mild this coming winter could lead to a second bloom next year, because based on records, under these conditions, the blooms have repeated for two years in a row. “Still, the chances are low, based on past events, that it will go on for a long time,” they said. “But the sea keeps giving us surprises currently so it’s hard to forecast.” The annual review also highlighted further encouraging coastal sightings across British shores, including: Unprecedented numbers of grey seals seen in Cumbria. Peak numbers of puffins on an island off Wales. The initial discovery of the *Capellinia fustifera* nudibranch in a northern county, usually found in the south-west. A Mediterranean fish species spotted off the coast of a southern county for the first time. Not All Positive News Challenges were also present, however. “The period was framed by ecological challenges,” noted a conservation leader. “A significant shipping incident in the North Sea and the release of industrial pellets off the Sussex coast were serious issues. Staff and volunteers are putting in immense work to defend and heal our marine habitats.”