🔗 Share this article 2025 Declared the 'Year of the Octopus' Off Britain's South Coast. Record-breaking observations of one of the world's most intelligent invertebrates this past summer have led to the designation of 2025 as the octopus's year in a seasonal assessment of Britain’s seas. A Perfect Storm Driving a Surge An unusually warm winter and then a very warm springtime prompted a huge population of *Octopus vulgaris* to establish themselves along England’s south coast, from Penzance in Cornwall to south Devon. “The reported landings was roughly thirteen times what we would typically see in this region,” stated an ocean conservation expert. “Based on the totals, around 233 thousand octopuses were present in these waters this year – that’s a huge increase from historical averages.” The common octopus is found in these waters but usually so scarce it is infrequently encountered. A population bloom is attributed to a combination of a mild winter and favorable spring temperatures. This perfect scenario meant a higher survival rate for young, potentially supported by abundant stocks of spider crabs seen in the area. A Historic Event The most recent occasion, such an octopus proliferation comparable was observed in 1950, with past documentation indicating the one before that was in the turn of the 20th century. The huge numbers of octopuses meant they could be frequently seen in nearshore environments for the first time in recent history. Video footage show octopuses gathering in groups – contrary to their normally lone nature – and “walking” along the ocean floor on their tentacle tips. A curious octopus was even seen investigating an underwater camera. “During a first dive in that area this year I saw five octopuses,” the officer added. “They are large specimens. There are two types in UK waters. One species is rather small, the size of a ball, but the *Octopus vulgaris* can be reaching impressive sizes.” Looking Ahead & Coastal Highlights If conditions remain mild going into 2026 meant it was possible a repeat event next year, because historically, with such patterns, events have occurred consecutively for two consecutive years. “However, it is unlikely, based on past events, that it will persist indefinitely,” they cautioned. “But the sea keeps giving us surprises currently so it’s hard to forecast.” The report also noted further encouraging coastal sightings along the coast, including: Unprecedented numbers of grey seals observed in Cumbria. Record numbers of puffins on an island off Wales. A first-ever sighting of the *Capellinia fustifera* nudibranch in Yorkshire, normally residing farther south. A type of blenny discovered off the coast of Sussex for the inaugural time. Not All Positive News The year had its low points, 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 tonnes of plastic biobeads off the Sussex coast served as stark reminders. Staff and volunteers are working tirelessly to protect and restore our shorelines.”
Record-breaking observations of one of the world's most intelligent invertebrates this past summer have led to the designation of 2025 as the octopus's year in a seasonal assessment of Britain’s seas. A Perfect Storm Driving a Surge An unusually warm winter and then a very warm springtime prompted a huge population of *Octopus vulgaris* to establish themselves along England’s south coast, from Penzance in Cornwall to south Devon. “The reported landings was roughly thirteen times what we would typically see in this region,” stated an ocean conservation expert. “Based on the totals, around 233 thousand octopuses were present in these waters this year – that’s a huge increase from historical averages.” The common octopus is found in these waters but usually so scarce it is infrequently encountered. A population bloom is attributed to a combination of a mild winter and favorable spring temperatures. This perfect scenario meant a higher survival rate for young, potentially supported by abundant stocks of spider crabs seen in the area. A Historic Event The most recent occasion, such an octopus proliferation comparable was observed in 1950, with past documentation indicating the one before that was in the turn of the 20th century. The huge numbers of octopuses meant they could be frequently seen in nearshore environments for the first time in recent history. Video footage show octopuses gathering in groups – contrary to their normally lone nature – and “walking” along the ocean floor on their tentacle tips. A curious octopus was even seen investigating an underwater camera. “During a first dive in that area this year I saw five octopuses,” the officer added. “They are large specimens. There are two types in UK waters. One species is rather small, the size of a ball, but the *Octopus vulgaris* can be reaching impressive sizes.” Looking Ahead & Coastal Highlights If conditions remain mild going into 2026 meant it was possible a repeat event next year, because historically, with such patterns, events have occurred consecutively for two consecutive years. “However, it is unlikely, based on past events, that it will persist indefinitely,” they cautioned. “But the sea keeps giving us surprises currently so it’s hard to forecast.” The report also noted further encouraging coastal sightings along the coast, including: Unprecedented numbers of grey seals observed in Cumbria. Record numbers of puffins on an island off Wales. A first-ever sighting of the *Capellinia fustifera* nudibranch in Yorkshire, normally residing farther south. A type of blenny discovered off the coast of Sussex for the inaugural time. Not All Positive News The year had its low points, 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 tonnes of plastic biobeads off the Sussex coast served as stark reminders. Staff and volunteers are working tirelessly to protect and restore our shorelines.”