2025 Hailed as the 'Year of the Octopus' Along Britain's South Coast.
Exceptionally high observations of a supremely intelligent sea creature during the summer season have led to the designation of 2025 as the year for octopuses in a seasonal assessment of Britain’s seas.
A Perfect Storm for a Population Boom
A mild winter followed by a remarkably hot spring triggered unprecedented numbers of Mediterranean octopuses to take up residence along the shores from Cornwall to Devon, spanning the Cornish and Devonian coasts.
“The volume of octopuses caught was roughly thirteen times what we would usually anticipate in this region,” stated an ocean conservation expert. “Calculating the figures, around 233 thousand octopuses were found in UK waters this year – that’s a huge increase from what is typical.”
*Octopus vulgaris* is indigenous to UK waters but usually so scarce it is seldom observed. An explosive growth is the result of a combination of a mild winter and a warm breeding season. Such favorable circumstances meant a higher survival rate for young, maybe aided by abundant stocks of a favored prey species also recorded.
A Rare Phenomenon
The last time, a population surge of this scale this significant was observed in the 1950s, with past documentation indicating the last bloom prior to that was in the turn of the 20th century.
The remarkable abundance of octopuses meant they could be readily observed in shallow waters for the first time in recent history. Underwater recordings show octopuses congregating together – they are usually solitary – and “walking” along the seabed on their arm ends. One creature was even recorded reaching for a diver's camera.
“On my initial dive there this year I saw five of these creatures,” they noted. “And these are big. There are two types in the region. The curled octopus is quite small, the size of a ball, but these common octopuses can be with a span of 1.5 meters.”
Predictions and Marine Joy
A second gentle winter this coming winter could lead to another surge the following year, because in the past, in similar situations, events have occurred consecutively for two consecutive years.
“But, it's improbable, based on past events, that it will go on for a long time,” they stated. “The ocean is full of surprises at the moment so it’s hard to forecast.”
The assessment also highlighted additional positive marine news around the UK coastline, including:
- Highest-ever counts of gray seals recorded in one northern region.
- Record numbers of puffins on Skomer.
- The first recording of the *Capellinia fustifera* nudibranch in Yorkshire, usually found in the south-west.
- A Mediterranean fish species discovered off the coast of Sussex for the first occasion.
Not All Positive News
The year had its low points, however. “The year was bookended by ecological challenges,” stated an expert. “A major tanker collision in the North Sea and an accidental discharge of industrial pellets off the Sussex coast highlighted ongoing threats. Staff and volunteers are working tirelessly to defend and heal our coasts.”