Every culture with a coastline has a mermaid story. And most of them are nothing like the one you’re picturing.
If your mental image of mermaid mythology starts and ends with a redhead singing on a rock, you’re in for a surprise. The real myths are stranger, darker, and more varied than any single story could hold. Some mermaids weep pearls. Some drag sailors to their deaths. Some are gods. And some are warnings dressed in scales.
That variety is exactly what makes mermaid mythology so fascinating, and why it keeps showing up in modern fantasy. The legends aren’t interchangeable. Each one carries the fingerprints of the culture that created it, and when you know the source material, you start seeing those threads everywhere in the books you love.
So let’s dive in. (Sorry. Had to.)
Greek Sirens: The Ones Who Sang You to Your Death
The sirens of Greek mythology are the great-grandmothers of the modern mermaid, but they’d barely recognize their descendants. The originals weren’t even fish-tailed. Early depictions show them as bird-women, perched on rocky islands, singing songs so beautiful that sailors would steer straight into the cliffs to get closer.
Over time, the bird features gave way to fish tails, especially as the myths migrated into medieval European art. But the core idea stayed: a beautiful, dangerous creature whose voice was the weapon. Not teeth, not claws: music. There’s something unsettling about that. The danger isn’t that the siren attacks you. It’s that she makes you want to destroy yourself.
Homer’s Odysseus famously had his crew plug their ears with beeswax and tie him to the mast so he could hear the song without acting on it. That image, a man bound to his own ship, screaming to be released toward his own death, tells you everything about what the Greeks thought beauty and desire could do to a person.
You can see siren DNA all over modern fantasy. Alexandra Christo’s To Kill a Kingdom flips the Little Mermaid story on its head with a siren princess who collects the hearts of human princes. Bethany C. Morrow’s A Song Below Water reimagines sirens as Black women in modern Portland, whose voices are both power and threat in a society that fears them.
Selkies: The Saddest Stories in the Sea (Scotland & Ireland)
Move north to the Scottish and Irish coasts and the mermaids change shape entirely. Selkies aren’t fish-tailed at all, they’re seals who shed their skins to walk on land as humans. The stories are almost always about loss.
The classic selkie tale goes like this: a man finds a selkie woman’s seal skin while she’s in human form. He hides it. She can’t return to the sea, so she stays, marries him, has children. Years later, she finds the skin and goes back to the ocean, leaving her family behind.
It’s a captivity story wrapped in a love story, and it’s quietly devastating. The selkie doesn’t choose land, she’s trapped there. The longing for the sea isn’t metaphorical; it’s the defining fact of her existence. These myths wrestle with questions of identity and belonging that hit differently than the Greek “beauty kills” model. Who are you when you’re separated from the thing that makes you yourself?
Selkie mythology has had a quieter influence on modern fantasy than the sirens, but it runs deep. Any mermaid story that deals with transformation, hidden identity, or the cost of living between two worlds owes something to the selkie tradition.
Mami Wata: Power, Wealth, and Don’t You Dare Disrespect Her (West & Central Africa, Caribbean)
Mami Wata is not a fairy tale. She’s a living spiritual figure, revered across West and Central Africa and throughout the Caribbean diaspora. Usually depicted as a beautiful woman with long dark hair and a serpent or fish tail, she embodies wealth, fertility, beauty, and healing…but she demands devotion in return.
The relationship with Mami Wata is transactional in the most sacred sense. She can grant you prosperity, artistic talent, or spiritual insight. But if you betray her trust, break a vow, or show disrespect, the consequences are severe. She’s not evil — she’s powerful, and she expects to be treated accordingly.
What makes Mami Wata so different from European mermaid figures is the agency. She’s not a victim, not a temptress waiting to be rescued or destroyed. She’s a force. In Vodou and other Afro-Caribbean spiritual traditions, the related figure La Sirène operates similarly: a spirit of the sea who can elevate or devastate.
Natasha Bowen’s Skin of the Sea draws directly from the Mami Wata tradition, following a young woman who serves the gods as a mermaid collecting the souls of those who die at sea. Tomi Adeyemi’s Children of Blood and Bone isn’t a mermaid book, but its treatment of Yoruba-rooted magic as something powerful, ancestral, and political comes from the same cultural wellspring.
Ningyo: Eat the Fish, Live Forever, Regret Everything (Japan)
Japanese mermaid mythology goes in a completely different direction. The ningyo is less “beautiful sea maiden” and more “unsettling fish creature with a human face.” Early descriptions give them monkey-like mouths, shimmering golden scales, and a quiet, weeping demeanor. They’re eerie, not glamorous.
The most famous ningyo legend involves their flesh: eat it and you’ll gain eternal youth. Sounds like a good deal until you hear the stories. The tale of Yao Bikuni tells of a woman who accidentally ate ningyo flesh as a child and lived for 800 years, watching everyone she loved die, before finally becoming a nun and willing herself to death.
Immortality as curse, not gift. That’s a very different emotional register from the Western mermaid tradition, and it shows up in fantasy more than you might expect. Any story where a mermaid’s power comes with a terrible price, where the magic costs something essential, is drawing from this well, whether the author knows it or not.
And then there’s the superstition angle: catching a ningyo was believed to bring storms and catastrophe to entire villages. These weren’t creatures you wanted to encounter. They were omens.
Renyu: Pearls, Silk, and Sorrow (China)
Chinese mermaid mythology offers yet another variation. The renyu (literally ‘human fish’) appears in texts going back over a thousand years. In some versions, she weeps tears that become pearls. In others, she’s a master weaver who produces silk of impossible beauty.
The emotional tone is melancholy rather than menacing. The renyu is often portrayed as gentle, shy, and sorrowful, a creature of beauty who exists at the margins of the human world, always slightly out of reach. Where Greek sirens are aggressive and Japanese ningyo are ominous, the renyu is tragic in a quieter way.
This tradition adds something important to the global mermaid picture: the idea that the ocean’s magic is tied to craft, art, and creation, not just destruction. Pearls from tears. Silk from sea-fingers. There’s a poetry to that which feels genuinely different from the “lure and kill” model.
Water Guardians of the Pacific (Polynesia & Oceania)
Polynesian and Pacific Island cultures don’t have “mermaids” in the European sense, but they have water spirits that fill a similar mythological role. The mo’o of Hawaiian tradition are powerful guardian spirits, sometimes dragon-like, sometimes shapeshifting, associated with sacred pools, rivers, and waterfalls.
These aren’t strangers from the deep. They’re kin. For island cultures, the ocean isn’t a mysterious frontier, it’s home, provider, ancestor. Water spirits are protectors tied to specific places and family lineages. Disrespecting them means disrespecting the land and the people who came before you.
This framing shifts the entire emotional relationship with water creatures. In European mythology, the sea is something to fear. In Pacific traditions, it’s something to honor. That’s a fundamentally different starting point for a mermaid story, and it’s one that modern fantasy is only beginning to explore.
Rusalki: The Drowned and the Dangerous (Slavic Tradition)
One more tradition worth knowing: the rusalki of Slavic folklore. These are the spirits of young women who died by drowning (often by violence or suicide) and who return as water spirits tied to rivers and lakes. During Rusalka Week in early summer, they were said to leave the water and dance in the fields, and any man who joined the dance would be tickled to death. (Yes, really.)
Rusalki aren’t mermaids in the tail-and-scales sense, but they occupy the same mythological space: beautiful, dangerous, tied to water, carrying unfinished human grief. They’re revenge stories. They’re ghost stories. And they add a layer of social commentary, many rusalka tales are ultimately about what happens to women who are wronged and have no other recourse.
Leigh Bardugo’s Grisha universe draws from Slavic folklore (though not rusalki specifically), and the emotional DNA is there: magic as inheritance, water as memory, power as something that rises from suffering.
Why Mermaid Mythology Keeps Showing Up in Fantasy
Here’s what strikes me about all of these traditions: they’re all telling different stories with the same basic ingredients. A creature between worlds. Water as a border between the known and the unknown. Beauty that’s never quite safe.
But the meaning changes completely depending on who’s telling the story. Greek sirens are about the danger of desire. Selkies are about the pain of captivity. Mami Wata is about the responsibilities of power. Ningyo are about the cost of wanting too much. Rusalki are about what happens when grief has nowhere else to go.
That’s why mermaid stories keep getting written. The mythology isn’t one story — it’s a framework that can hold almost any human fear or longing. And modern fantasy authors are doing incredible things with it.
A few more mermaid reads worth your time:
Skin of the Sea by Natasha Bowen: Mami Wata mythology meets a quest across West African spiritual landscapes. Gorgeous and devastating.
To Kill a Kingdom by Alexandra Christo: A siren princess and a prince who hunts them. Enemies-to-lovers with actual teeth.
A Song Below Water by Bethany C. Morrow: Black sirens in modern Portland. Fantasy as a lens for identity, race, and what it means to have a dangerous voice.
Deep Blue by Jennifer Donnelly: Six mermaid heroines from different ocean realms unite to fight an ancient evil. Epic in the truest sense, drawing from mythology across multiple cultures.
The Mermaid by Christina Henry: A mermaid navigates P.T. Barnum’s world. Historical fiction meets fairy tale meets sharp commentary on exploitation and spectacle.
What My Own Mermaid Series Owes to These Myths
I didn’t set out to write a mythology textbook when I started The Mermaid Curse series. But these legends were in my head the whole time, and they shaped the world whether I planned it or not.
In The Atlantis Twins, Alysa Grey wakes after a boating accident with no memory, convinced her missing twin is still alive. As she’s pulled toward a mysterious island, the story carries echoes of the siren tradition, the sea as something that calls to you, that pulls you toward a truth you might not survive learning. But there’s Mami Wata in there too: the idea that the ocean’s power demands something from you, that you can’t just take from it without giving something back.
The Atlantis Song moves to Venice, a city built on water, full of secrets, where the mythology deepens. And The Atlantis Queens wrestles with the question that sits at the heart of almost every mermaid myth: what do you inherit from the sea, and what does it cost?
If any of that sounds like your kind of story, you can actually start the series for free. Alabaster Island: The Mermaid Curse Prequel is available when you join my reader list, it’s a full prequel novella that sets the stage for everything that follows, and it’s my way of saying thanks for being curious about mermaid stories in the first place.
If you enjoyed this deep dive into mermaid mythology, you might also like Reading Outside the Castle: Fantasy Novels From Around the World or Folklore’s Shadow: How Modern Fantasy Reshapes Our Fear. And for more on how real-world myth shapes fantasy fiction, check out Behind the Magic: Real-World Inspirations for YA Fantasy.
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