2025 Hailed as The Year for Octopuses Off England's South Coast.
Unprecedented sightings of a supremely intelligent sea creature over the summer months have prompted the declaration of 2025 as the octopus's year in a yearly report of the nation's marine environment.
A Perfect Storm Leading to an Explosion
A mild winter coupled with a very warm springtime triggered a massive influx of common octopuses (*Octopus vulgaris*) to settle along the shores from Cornwall to Devon, across the southwestern peninsula.
“The volume of octopuses caught was roughly over a dozen times what we would typically see in Cornish waters,” stated a marine conservation officer. “When we added up the numbers, nearly a quarter of a million octopuses were present in these waters this year – representing a massive jump from historical averages.”
*Octopus vulgaris* is native to these waters but ordinarily in such small numbers it is seldom observed. A sudden increase is the result of a combination of gentle winter conditions and a warm breeding season. These ideal conditions meant increased juvenile survival, potentially supported by large numbers of a favored prey species also recorded.
A Historic Event
The last time, an octopus bloom of this size was observed in the 1950s, with historical records indicating the one before that occurred in 1900.
The sheer quantity 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 – unlike their typical solitary behavior – and ambulating along the ocean floor on their tentacle tips. A curious octopus was even filmed grabbing submarine recording equipment.
“On my initial dive off the Lizard peninsula this year I saw five octopuses,” the specialist continued. “They are sizeable. We have two species in these waters. The curled octopus is rather small, about the size of a football, but these newcomers can be up to a metre and a half wide.”
Looking Ahead & Coastal Highlights
If conditions remain mild heading into next year meant it was possible a repeat event the following year, because based on records, with such patterns, the blooms have repeated for two years in a row.
“But, it's improbable, from previous blooms, that it will go on for a long time,” they said. “The ocean is full of surprises currently so it’s quite an unpredictable situation.”
The assessment also highlighted other “surprises, successes and joyful moments” around the UK coastline, including:
- Highest-ever counts of grey seals observed in one northern region.
- Exceptional populations of the iconic seabirds on an island off Wales.
- A first-ever sighting of a rare sea slug in Yorkshire, typically a southwestern species.
- A Mediterranean fish species discovered off the coast of Sussex for the inaugural time.
Environmental Concerns
Challenges were also present, however. “The calendar year was marked by ecological challenges,” noted a conservation leader. “A significant shipping incident in the North Sea and a spill of plastic pollution off the Sussex coast were serious issues. Dedicated individuals are working tirelessly to safeguard and rehabilitate our coasts.”