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Mermaids of the British Isles: The Two-Tailed Siren, the Stolen Bell, and the Creatures of the Boundary
- Untruth Seekers
- Jul 24
- 7 min read
The mermaid of British folklore is not the creature of Victorian sentiment: golden-haired, wistful, harmlessly beautiful, sitting on a rock, combing her hair and wishing she had legs.
She is older than that, and considerably less idyllic.
She is a figure of the boundary between worlds – the place where land runs out and the sea takes over, where the rules of the human world cease to apply and something older and less negotiable begins.
She is beautiful, yes, in the way that dangerous things are often beautiful. She has grievances. She makes requests that are reasonable on their surface and costly beneath it. She is not malevolent, exactly. She is simply operating according to an entirely different set of priorities, and the sea’s priorities have never been especially accommodating to the human ones.
The two tails: a different kind of mermaid
The mermaid most people picture has a single tail. But there is another mermaid in the British tradition – one with two tails, holding them spread wide on either side of her body – and she is considerably older, and considerably more ambiguous in her meaning.
The two-tailed mermaid, sometimes called the melusine or siren, appears carved into the stonework and woodwork of medieval churches across Britain and Europe. She is a common figure on misericords – the small carved wooden ledges beneath choir seats – and on bench ends, fonts, and corbels, particularly in coastal counties. Sussex churches, like those across the south of England, preserve examples of her in their medieval fabric: a reminder that the sea was never very far from the imagination of the people who built and worshipped in them.
The Church’s interpretation of the two-tailed mermaid was generally cautionary. She represented vanity, temptation, and the danger of worldly beauty – a woman so preoccupied with her own appearance that she was holding up her own tails to display herself. Carved into the fabric of a church, she served as a warning: here is what should not be. The communities that worshipped alongside her had their own views, less easily categorised, in which the mermaid was a figure of the sea itself – powerful, beautiful, and not entirely to be trusted.
Sussex: the Mixon Hole, the stolen bell, and the giant’s apology
Off the headland of Selsey Bill, where the Sussex coast juts south into the English Channel and the chalk meets the sea in a slow, centuries-long argument about where the land ends, there is a deep underwater depression in the seabed known as Mixon Hole. The water there is dark. The fishermen of Selsey have always known it. And according to local tradition, it is where the merfolk live.
Selsey itself has a long memory of the sea taking things. The original cathedral of the South Saxons, established by Saint Wilfrid in the seventh century when he brought Christianity to the South Saxon people, is said to be somewhere beneath the waves – the coastline having shifted so considerably in the intervening centuries that what was once solid ground is now seabed. On very calm days, there are those who claim to hear the ghost of a bell ringing from the water. The legend gives that bell a specific history.
The story of Sven and the mermaid of Mixon Hole
As the story is told in Sussex Roots, there was once a simple giant who was content to spend his days fishing from the cliff's edge. He was not ambitious. He was not violent. He had a fishing pole and access to the sea and no particular requirements beyond a decent catch.
One day, he felt a sharp tug on the line. He reeled it in, expecting cod, haddock, or bass. Instead, he found a mermaid – hooked through the lip and flapping desperately to free herself.
The giant removed the hook carefully and apologised. The mermaid, once she could speak, was not in a mood to hear apologies. He had caused her harm. He owed her a favour. The giant, who thought she was the most beautiful creature he had ever seen and felt the injury keenly, agreed without hesitation.
The mermaid’s request was specific. Every day she heard a clanging sound rising from the town above the cliffs – from Saint Wilfrid’s Church, its bell ringing the hours and the services with a clarity that carried across the water and down into the sea. She had never heard anything like it. The seafolk had no music of that kind, and she had become entirely enamoured with it. She wanted the bell.
The giant went to the town. The townspeople made what attempts they could to stop him, which were, as the story acknowledges, meagre. He lifted the bell from the tower of Saint Wilfrid’s Church and carried it back to the cliff. Then he tossed it down into Mixon Hole, where it sank to the merfolk’s home.
And on clear, calm days, those who know to listen can still hear it: a watery, distant clang rising from the deep water at Mixon Hole, where a mermaid who wanted beautiful music got exactly what she asked for.
It is an unusually gentle story for a giant tale – no slaying, no heroism, just a large and well-meaning being doing his earnest best to correct an accidental wrong, and a mermaid who knew precisely what she wanted and asked for it directly. In the giant’s telling of it, there is a melancholy quality: the bell is gone, the town is without its music, and the mermaid has what she desired. Whether that constitutes a happy ending depends on where you are standing, and how far you are from the sea.
Cornwall: the mermaid of Zennor
The Cornish mermaid tradition is anchored at Zennor, a small village on the north Cornish coast, by a story and a carving. The carving – a mermaid with a mirror and a comb, cut into a medieval bench end in the parish church of Saint Senara – is the oldest surviving representation of the legend.
The story it illustrates concerns a young man named Matthew Trewhella, whose singing was so beautiful that it attracted a mermaid from the sea. She came to the church to hear him. He followed her back to the water. Neither was seen again, though fishermen sometimes claimed to hear them singing together in the depths of the cove.
The Zennor mermaid is neither wicked nor kind. She heard something she wanted and moved toward it, as the Mixon Hole mermaid heard the bell and found a way to obtain it. The logic of the mermaid in these stories is entirely her own. Human structures – churches, communities, the expectation that people who go to sea come back – are not her concern.
Scotland and Ireland: selkies, Ceasg, and the merrow
Scotland’s relationship with seal-people and mer-creatures is among the richest in the British Isles. The Ceasg is a freshwater mermaid of the Highlands – a woman from the waist up, a salmon below – who, like the merrow of Ireland, possesses a supernatural object that enables her to live between worlds. Capture the Ceasg’s soul, held in an egg or a small container, and she will grant three wishes. Treat her well and she will guide ships safely. Treat her poorly and the sea will remember.
The selkie tradition – seal-people who shed their skins to walk on land – runs through both Scottish and Irish folklore and is closely related to the mermaid tradition without being identical to it. The selkie stories are, at their core, about captivity and longing: a man finds a selkie woman’s skin and hides it, binding her to land and a human life; she lives among humans, raises children, loves them – and when she finds the skin, she returns to the sea without hesitation. The sea, in these stories, is not a threat. It is home. The tragedy is that it cannot be shared.
Ireland’s merrow wears a magical cap – the cohuleen druith – that allows passage between the human world and the sea. Without it, she cannot return to the water. The Irish tradition is unusual in that male merrows also appear in the folklore, though they are described as considerably less beautiful than their female counterparts, with green hair and teeth and a general air of having spent too long at depth.
Wales: the lake maidens and coastal creatures
Wales’s water-woman tradition overlaps with the mermaid in the figure of the lake maiden – a creature of the boundary between land and water who marries into the human world under specific conditions, and departs when those conditions are broken. The Welsh tradition, like the Irish, tends toward the idea of a being who is not supernatural in a threatening sense but simply native to a different element, operating under different rules, and capable of moving between worlds in ways that humans cannot. The tragedy, when it comes, is usually caused by a human who forgot which world they were dealing with.
The creature of the boundary
What the mermaid traditions of the British Isles share – from the two-tailed carving in a medieval church to the sunken bell at Mixon Hole – is an understanding of the sea’s fundamental difference from the land. The mermaid is not a human who lives underwater. She is a being of a different order, with her own desires, her own logic, and her own understanding of what constitutes a fair arrangement.
The encounters in these stories go wrong, when they go wrong, because someone forgot this. Matthew Trewhella followed the mermaid into her world without understanding he could not come back. The selkie’s husband hid her skin without understanding what he was asking her to give up. The giant at Mixon Hole understood, which is perhaps why his story ends without catastrophe: he listened to what the mermaid wanted, he provided it, and he did not attempt to keep her or follow her or make the encounter into something it was never going to be.
The bell still rings, on clear calm days, from somewhere below Mixon Hole. The mermaid is still listening.
Sussex Roots
The mermaid of Mixon Hole – two-tailed, particular in her tastes, and in possession of a church bell she did not come by honestly – is one of the figures at the heart of Sussex Roots. Her story, told by the giant Sven who knows it better than anyone, is a local legend rooted in the specific geography of the Selsey coast: the deep water, the lost settlement, the bell that the sea took and kept. She is, like all the best folkloric figures, entirely reasonable on her own terms. The terms are simply not human ones.
About the Untruth Seekers
The Untruth Seekers are dedicated investigators of the legends, ghost stories, and historical mysteries lurking beneath the surface of Sussex and beyond. Their confidential files document the folklore, hauntings, and half-buried histories that most people walk past without a second glance. All findings are published under the series From the Confidential Files of the Untruth Seekers, for readers who suspect there is always more to the story.
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