A colossal, purple-hued lion’s mane jellyfish, roughly six feet across, stunned beachgoers at Nairn near Inverness, dwarfing a nearby dog in an almost surreal display of nature’s scale. Lion’s mane jellyfish (Cyanea capillata) are the largest known species of jellyfish in the world.
Their delicate, flowing tentacles can extend over 100 feet—longer than a blue whale—and their sting, while rarely fatal, can induce nausea, sweating, and severe cramps. These invertebrates are usually found in cold, northern waters, and their presence in UK seas is considered seasonal, often peaking in late summer and autumn.
Spotted in the Scottish Highlands, this giant is a rare visitor to UK waters, though smaller lion’s mane specimens are occasionally washed ashore.
UK seas host a variety of other jellyfish species, including the translucent moon jelly (Aurelia aurita), the compass jelly (Chrysaora hysoscella) with its distinctive brown markings, and the smaller but painful blue jelly (Cyanea lamarckii).
Jellyfish are made up of over 90% water, have no brain or heart, and use a simple nerve net to sense their surroundings. Some species can even clone themselves and survive for long periods in a dormant state.
Inverness may be famous for a rather different kind of monster – the Loch Ness variety – but David Alexander Bowie, who found the jellyfish, was still taken aback.
He said: “For anyone planning a visit to the beach, this is the size of jellyfish being washed up and in the water. Along with hundreds more slightly smaller ones—so take care if you are planning a swim.”
He added: “I think they are lion’s mane. I’ve never seen one this size before. I’ve never seen them dead on the beach either. I have also found others, but not quite as big. There are a lot of smaller ones on the beach west of Nairn.”
Observers were left stunned by the jellyfish’s sheer scale. The six-foot-wide creature, roughly the size of a paddling pool, made an ordinary beach day feel almost otherworldly.
Lion’s mane jellyfish are considered “gelatinous giants” of the ocean, and their striking reddish-purple hue makes them one of the most recognisable jellyfish species in the world.
Locals were equally astonished. One said: “Lion’s mane jellyfish. Can give you a bad sting.”
Another remarked: “That’s a lion’s mane—the bigger they are the worse the sting.”
A third simply said: “Even for a lion’s mane, that is massive.”
This extraordinary beach invasion offers a rare—and somewhat eerie—glimpse into the deep-sea giants that sometimes drift into UK waters.
While largely harmless if admired from a distance, their sheer size and long tentacles remind us of the mysterious and powerful creatures lurking just beneath the waves.
