2025 Declared the 'Year of the Octopus' Off England's Southern Shores.
Record-breaking observations of a remarkably clever cephalopod over the summer months have resulted in the naming of 2025 as the octopus's year in an annual review of UK coastal waters.
Ideal Conditions Leading to an Explosion
A gentle winter coupled with a very warm springtime catalyzed a huge population of *Octopus vulgaris* to establish themselves along the shores from Cornwall to Devon, spanning the Cornish and Devonian coasts.
“The scale of the catch was approximately over a dozen times what we would normally expect in this region,” stated a marine life specialist. “Calculating the figures, nearly a quarter of a million octopuses were present in British seas this year – representing a massive jump from what is typical.”
*Octopus vulgaris* is native to these waters but ordinarily in such small numbers it is infrequently encountered. An explosive growth is the result of the dual effect of a mild winter and favorable spring temperatures. Such favorable circumstances meant increased juvenile survival, possibly in part fuelled by significant populations of spider crabs also recorded.
An Uncommon Occurrence
The last time, an octopus bloom this significant was recorded in the mid-20th century, with past documentation indicating the last bloom prior to that occurred in 1900.
The sheer quantity of octopuses meant they could be easily spotted in nearshore environments for a rare occurrence. Underwater recordings show octopuses congregating together – they are usually solitary – and “walking” along the bottom on the tips of their limbs. A curious octopus was even recorded reaching for a diver's camera.
“The first time I dived off the Lizard peninsula this year I saw five octopuses,” they noted. “They are sizeable. There are two types in the region. One species is quite small, the size of a ball, but the *Octopus vulgaris* can be with a span of 1.5 meters.”
Looking Ahead & Coastal Highlights
A second gentle winter this coming winter meant it was possible another surge in 2026, because historically, in similar situations, events have occurred consecutively for two consecutive years.
“But, it's improbable, from previous blooms, that it will persist indefinitely,” they stated. “The ocean is full of surprises currently so it’s hard to forecast.”
The assessment also celebrated additional positive marine news around the UK coastline, including:
- A record number of gray seals recorded in Cumbria.
- Exceptional populations of the iconic seabirds on Skomer.
- A first-ever sighting of an unusual mollusc in a northern county, normally residing farther south.
- A type of blenny spotted off the coast of Sussex for the inaugural time.
A Note of Caution
Not everything was good news, however. “The year was bookended by environmental disasters,” noted a conservation leader. “A significant shipping incident in March and the release of industrial pellets off the southern coast highlighted ongoing threats. Staff and volunteers are working tirelessly to safeguard and rehabilitate our marine habitats.”
