🔗 Share this article 2025 Declared 'The Octopus Year' Along England's South Coast. Record-breaking observations of one of the world's most intelligent invertebrates this past summer have prompted the designation of 2025 as the year for octopuses in a seasonal assessment of UK coastal waters. A Perfect Storm Driving a Surge A mild winter followed by a very warm springtime triggered a huge population of Mediterranean octopuses to establish themselves along England’s south coast, from Penzance in Cornwall to south Devon. “The volume of octopuses caught was of the order of about 13 times what we would normally expect in the waters around Cornwall,” stated a marine life specialist. “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 common octopus is found in British seas but typically so rare it is seldom observed. A population bloom is attributed to the dual effect of a mild winter and a warm breeding season. This perfect scenario meant more larvae, maybe aided by significant populations of a favored prey species also recorded. An Uncommon Occurrence The last time, an octopus bloom comparable was recorded in the 1950s, with historical records indicating the previous major event was in the turn of the 20th century. The huge numbers of octopuses meant they could be easily spotted in nearshore environments for the first time in recent history. Diver videos show octopuses gathering in groups – unlike their typical solitary behavior – and “walking” along the seabed on their tentacle tips. One individual was even filmed grabbing submarine recording equipment. “During a first dive off the Lizard peninsula this year I saw five octopuses,” the officer added. “They are sizeable. We have two species in UK waters. The curled octopus is rather small, football-sized, but these common octopuses can be with a span of 1.5 meters.” Future Prospects and Other Surprises Another mild winter heading into next year suggests the potential another surge the following year, because historically, under these conditions, events have occurred consecutively for two years running. “But, it's improbable, based on past events, that it will become a permanent fixture,” they stated. “Marine life is unpredictable currently so it’s a very uncertain scenario.” The annual review also highlighted further encouraging coastal sightings along the coast, including: Unprecedented numbers of gray seals observed in one northern region. Exceptional populations of puffins on a Welsh island. A first-ever sighting of an unusual mollusc in a northern county, typically a southwestern species. A Mediterranean fish species spotted off the coast of a southern county for the first time. Environmental Concerns Not everything was good news, however. “The calendar year was marked by ecological challenges,” said a head of marine conservation. “A significant shipping incident in March and the release of industrial pellets off the Sussex coast served as stark reminders. Conservation teams are making huge efforts to defend and heal our coasts.”
Record-breaking observations of one of the world's most intelligent invertebrates this past summer have prompted the designation of 2025 as the year for octopuses in a seasonal assessment of UK coastal waters. A Perfect Storm Driving a Surge A mild winter followed by a very warm springtime triggered a huge population of Mediterranean octopuses to establish themselves along England’s south coast, from Penzance in Cornwall to south Devon. “The volume of octopuses caught was of the order of about 13 times what we would normally expect in the waters around Cornwall,” stated a marine life specialist. “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 common octopus is found in British seas but typically so rare it is seldom observed. A population bloom is attributed to the dual effect of a mild winter and a warm breeding season. This perfect scenario meant more larvae, maybe aided by significant populations of a favored prey species also recorded. An Uncommon Occurrence The last time, an octopus bloom comparable was recorded in the 1950s, with historical records indicating the previous major event was in the turn of the 20th century. The huge numbers of octopuses meant they could be easily spotted in nearshore environments for the first time in recent history. Diver videos show octopuses gathering in groups – unlike their typical solitary behavior – and “walking” along the seabed on their tentacle tips. One individual was even filmed grabbing submarine recording equipment. “During a first dive off the Lizard peninsula this year I saw five octopuses,” the officer added. “They are sizeable. We have two species in UK waters. The curled octopus is rather small, football-sized, but these common octopuses can be with a span of 1.5 meters.” Future Prospects and Other Surprises Another mild winter heading into next year suggests the potential another surge the following year, because historically, under these conditions, events have occurred consecutively for two years running. “But, it's improbable, based on past events, that it will become a permanent fixture,” they stated. “Marine life is unpredictable currently so it’s a very uncertain scenario.” The annual review also highlighted further encouraging coastal sightings along the coast, including: Unprecedented numbers of gray seals observed in one northern region. Exceptional populations of puffins on a Welsh island. A first-ever sighting of an unusual mollusc in a northern county, typically a southwestern species. A Mediterranean fish species spotted off the coast of a southern county for the first time. Environmental Concerns Not everything was good news, however. “The calendar year was marked by ecological challenges,” said a head of marine conservation. “A significant shipping incident in March and the release of industrial pellets off the Sussex coast served as stark reminders. Conservation teams are making huge efforts to defend and heal our coasts.”