2025 Declared The Year for Octopuses Along Britain's South Coast.
Exceptionally high sightings of a remarkably clever cephalopod over the summer months have resulted in the declaration of 2025 as the octopus's year in a seasonal assessment of UK coastal waters.
A Perfect Storm Leading to an Explosion
An unusually warm winter coupled with a very warm springtime catalyzed unprecedented numbers of common octopuses (*Octopus vulgaris*) to take up residence along the southern coastline of England, spanning the Cornish and Devonian coasts.
“The volume of octopuses caught was of the order of about thirteen times what we would normally expect in this region,” explained an ocean conservation expert. “When we added up the numbers, nearly a quarter of a million octopuses were caught in these waters this year – that’s a huge increase from what is typical.”
The common octopus is indigenous to UK waters but typically so rare it is rarely seen. A sudden increase is the result of a combination of a mild winter and favorable spring temperatures. These ideal conditions meant increased juvenile survival, possibly in part fuelled by large numbers of other marine life noted in recent years.
A Rare Phenomenon
The most recent occasion, an octopus bloom of this size was documented in 1950, with historical records indicating the one before that occurred in 1900.
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 – unlike their typical solitary behavior – and ambulating along the ocean floor on the tips of their limbs. A curious octopus was even recorded reaching for submarine recording equipment.
“On my initial dive in that area this year I saw multiple octopuses,” the officer added. “And these are big. We have two species in the region. One species is smaller, the size of a ball, but the *Octopus vulgaris* can be with a span of 1.5 meters.”
Future Prospects and Other Surprises
If conditions remain mild heading into next year meant it was possible a repeat event next year, because historically, in similar situations, events have occurred consecutively for two years in a row.
“But, it's improbable, from previous blooms, that it will become a permanent fixture,” they stated. “But the sea keeps giving us surprises currently so it’s a very uncertain scenario.”
The annual review also noted further encouraging coastal sightings around the UK coastline, including:
- A record number of gray seals observed in one northern region.
- Peak numbers of puffins on Skomer.
- The first recording of an unusual mollusc in Yorkshire, normally residing farther south.
- A Mediterranean fish species spotted off the coast of Sussex for the first occasion.
Environmental Concerns
The year had its low points, however. “The calendar year was marked by ecological challenges,” stated an expert. “A major tanker collision in the North Sea and a spill of industrial pellets off the southern coast were serious issues. Conservation teams are putting in immense work to safeguard and rehabilitate our marine habitats.”