2025 Declared The Year for Octopuses Off England's South Coast.
Unprecedented sightings of a remarkably clever cephalopod during the summer season have led to the declaration of 2025 as the octopus's year in an annual review of the nation's marine environment.
A Perfect Storm Leading to an Explosion
A gentle winter and then a remarkably hot spring prompted a huge population of Mediterranean octopuses to establish themselves along England’s south coast, from Penzance in Cornwall to south Devon.
“The reported landings was approximately over a dozen times what we would normally expect in the waters around Cornwall,” explained a marine life specialist. “Calculating the figures, approximately 233,000 octopuses were found in British seas this year – that’s a huge increase from the norm.”
The common octopus is native to British seas but usually so scarce it is seldom observed. A population bloom is attributed to the dual effect of a mild winter and favorable spring temperatures. This perfect scenario meant more larvae, maybe aided by abundant stocks of other marine life noted in recent years.
A Rare Phenomenon
Previously, an octopus bloom of this size was recorded in 1950, with historical records indicating the previous major event was in the turn of the 20th century.
The remarkable abundance of octopuses meant they could be readily observed in coastal areas for the first time in living memory. Underwater recordings show octopuses being sociable – they are usually solitary – and ambulating along the ocean floor on their tentacle tips. One creature was even seen investigating an underwater camera.
“During a first dive there this year I saw multiple octopuses,” the specialist continued. “They are large specimens. We have two species in these waters. One species is quite small, the size of a ball, but these newcomers can be with a span of 1.5 meters.”
Predictions and Marine Joy
If conditions remain mild heading into next year meant it was possible a second bloom next year, because historically, under these conditions, the blooms have repeated for two consecutive years.
“But, it's improbable, from previous blooms, that it will go on for a long time,” they cautioned. “But the sea keeps giving us surprises these days so it’s a very uncertain scenario.”
The annual review also highlighted other “surprises, successes and joyful moments” around the UK coastline, including:
- A record number of grey seals seen in one northern region.
- Peak numbers of the iconic seabirds on an island off Wales.
- A first-ever sighting of the *Capellinia fustifera* nudibranch in Yorkshire, typically a southwestern species.
- A type of blenny found off the coast of a southern county for the inaugural time.
A Note of Caution
Not everything was good news, however. “The period was framed by ecological challenges,” stated an expert. “A significant shipping incident in the North Sea and a spill of plastic pollution off the southern coast were serious issues. Conservation teams are working tirelessly to protect and restore our shorelines.”