Sirenuca

Also Known As: la Sirenuca de Castro; Cantabrian diminutive of *sirena*, “mermaid”, formed with the regional suffix -uca, so roughly “the little mermaid of Castro”
Region/Culture: Southern Europe
Mythos: Cantabrian Mythology, Spanish Mythology
Primary Type/Nature: Fairy Folk and Spirit Beings
Mythical Attributes: She sings across open water in fog and darkness, and her voice tells sailors where the rocks are.
Role in Mythos: She is the local guardian of a lethal stretch of coast, made by a mother’s angry words and kept there by them.
Relation to Humans: The fishermen of Castro Urdiales came to know her voice and to value it, and some of them fell in love with her. She was one of their own before she was anything else, which is why the town still treats her as a neighbour rather than a monster.

The cliffs east of Castro Urdiales go bare at low tide and the rock left behind is black, wet and crowded with shellfish. It is the best gathering ground on that coast. It is also the place where the swell comes in hard against stone with nothing to hold, which is why the sensible women of the town worked the flats instead, in company, within shouting distance of each other. One girl went to the cliffs anyway. She went every day, and she sang while she worked.

She wedged her basket in a crack, prised the limpets off with a blade, and pitched her voice to the rhythm of the water coming in. Every so often she stopped and looked at herself in a small mirror of mother-of-pearl she carried with her, tilting it to catch the light. Salt dried white on her forearms. The sea kept time and she kept singing, and she came home each evening with more than anyone.

Her mother waited for those evenings badly. She knew the ground her daughter was standing on. She told her, over and over, to gather with the others and leave the cliffs alone, and in the telling most familiar in Cantabria she added a warning about what the sea does to girls who will not listen. The girl did not listen. So one day the mother, worn out and frightened and past choosing her words, said the thing that finished it: may the God of heaven allow you to become a fish.

What happened next happens in every version. The girl was out on the rocks alone when the little mirror slipped from her hand. She bent after it, went off balance, and dropped into the water. The sea was rough that day, but she was strong and she got herself back to the rock face, and it was only when she tried to climb out that she understood. Her legs were gone. In their place was a long fish tail, scaled and bright, and it would not take her weight on stone.

The descriptions stop there, and their plainness is worth noticing. She has no crown, no comb, no hoard, no green hair, none of the furniture that mermaids elsewhere are given. She is a young woman from a fishing town with a fish’s body below the waist, and in the version the town gives its schoolchildren she has blue eyes. That is the whole inventory.

Her power is her voice, and she turned it immediately to the one use that made sense to someone raised in that harbour. On nights of thick fog and on dark nights when the coast is invisible, the Sirenuca sings, and boats that are running blind toward the cliffs hear her and know to bear off. The classical sirens sang men onto the rocks. This one sings them away from the rocks, using the same instrument for the opposite purpose, and the men she sang for knew exactly whose voice it was.

Longer tellings do not leave her there. A fisherman hauling his nets one day found something in them heavy enough to need help aboard, and when he had her in the boat he was so taken with her that he kissed her, which broke the thing her mother had done. Her legs came back. She married him. And then she was miserable, because she wanted the cliffs and the open water and the singing, and a house does not offer any of those. She went back to the coast, and in the water below she saw the mother-of-pearl mirror she had lost, still down there after all that time. She went in after it. She did not come out again, and this time nothing could undo it. Her husband is said to have thrown himself from the same cliffs.

For a being with a supernatural voice she is remarkably easy to catch. A net takes her. A man’s kiss unmakes the curse without any ritual or bargain. She has no defence at all against the words of an ordinary woman losing her temper, and no way of undoing them herself, and the one thing that could free her turns out to be worse than the sea. Her limits are all human limits, transposed. What she cannot do is live on land and stay herself, and the mirror is the hinge every time, first pulling her in and then pulling her back.

Her name says most of this before the story starts. She is not *la sirena*, the mermaid, but *la sirenuca*, in the diminutive that Cantabrian speech reaches for constantly and that carries fondness rather than smallness. The town has never disowned her. A sculpture of her stands under the arcade of the building at Cotolino that carries her name, and in the Sámano valley she has a figure and a panel of her own on a mythological walking path, her story set out in Spanish, English and French for anyone who comes past. The regional tourist board keeps a recording of the legend. What almost nobody can point to is an old book. This one is kept alive by the place it belongs to, and it always has been.

Frequently Asked Questions

Who is the Sirenuca of Castro Urdiales?

The Sirenuca is a mermaid from the folklore of Castro Urdiales, a fishing town on the Cantabrian coast of northern Spain. She was originally a young local woman who gathered shellfish on the town’s most dangerous cliffs, and she was turned into a mermaid after her mother, worn down by her refusal to stay somewhere safe, said that God should turn her into a fish.

How did the Sirenuca become a mermaid?

She dropped the small mother-of-pearl mirror she always carried while working on the cliffs, lost her balance reaching for it, and fell into the sea. When she swam back and tried to climb out onto the rocks she found her legs had become a long scaled fish tail. Her mother’s words had taken effect.

Does the Sirenuca’s song harm sailors?

No. Unlike the sirens of Greek myth, the Sirenuca sings to save lives. On foggy days and dark nights she calls out across the water to warn boats that they are running toward the cliffs, and the fishermen of Castro Urdiales came to recognise her voice and value it.

Is the Sirenuca ever freed from the curse?

In the longer version of the legend, yes, briefly. A fisherman caught her in his nets, kissed her, and the curse broke, giving her back her legs, and they married. She could not settle on land, returned to the cliffs, saw her lost mirror in the water below and went in after it, becoming a mermaid again permanently.

Where can you see the Sirenuca in Castro Urdiales today?

A sculpture of her stands under the arcade of the building named after her at Cotolino, and she also appears as a figure with an interpretive panel on the mythological walking path in the Sámano valley, where her legend is told in Spanish, English and French.