2025 Declared the 'Year of the Octopus' Along Britain's South Coast.
Unprecedented sightings of one of the world's most intelligent invertebrates this past summer have resulted in the declaration of 2025 as the octopus's year in a seasonal assessment of the nation's marine environment.
A Perfect Storm Driving a Surge
A mild winter and then a very warm springtime catalyzed a huge population of common octopuses (*Octopus vulgaris*) to establish themselves along England’s south coast, spanning the Cornish and Devonian coasts.
“The scale of the catch was approximately 13 times what we would normally expect in this region,” stated a marine life specialist. “When we added up the numbers, nearly a quarter of a million octopuses were caught in UK waters this year – representing a massive jump from what is typical.”
The Mediterranean octopus is indigenous to British seas but typically so rare it is seldom observed. A population bloom is the result of a combination of gentle winter conditions and favorable spring temperatures. This perfect scenario meant a higher survival rate for young, potentially supported by significant populations of spider crabs noted in recent years.
A Rare Phenomenon
The last time, a population surge of this scale this significant was documented in 1950, with past documentation indicating the previous major event happened in the turn of the 20th century.
The remarkable abundance of octopuses meant they could be readily observed in nearshore environments for a rare occurrence. Diver videos show octopuses being sociable – they are usually solitary – and “walking” along the bottom on their tentacle tips. One individual was even filmed grabbing a diver's camera.
“During a first dive there this year I saw multiple octopuses,” the officer added. “They are large specimens. There are two types in these waters. The curled octopus is quite small, about the size of a football, but these common octopuses can be up to a metre and a half wide.”
Predictions and Marine Joy
Another mild winter this coming winter could lead to another surge the following year, because in the past, under these conditions, events have occurred consecutively for two years in a row.
“Still, the chances are low, looking at history, that it will become a permanent fixture,” they said. “The ocean is full of surprises at the moment so it’s quite an unpredictable situation.”
The report also highlighted additional positive marine news around the UK coastline, including:
- Highest-ever counts of grey seals recorded in one northern region.
- Record numbers of the iconic seabirds on Skomer.
- The initial discovery of an unusual mollusc in a northern county, normally residing farther south.
- A type of blenny discovered off the coast of a southern county for the first time.
Environmental Concerns
Challenges were also present, however. “The year was bookended by environmental disasters,” noted a conservation leader. “A significant shipping incident in March and an accidental discharge of plastic pollution off the southern coast served as stark reminders. Conservation teams are putting in immense work to safeguard and rehabilitate our marine habitats.”
