Wednesday, February 11, 2026

The extinction of mermaids

Photo Credit: UNxArtPartner Create COP25 Haenyeo 2019

Emerald sequins bathed in refracting light. Lavender velvet crushed beneath loose limbs. Shimmering turquoise dappled with the tacky remnants of a cherry ice pop. These were the qualities that sketched the lines of one of my most treasured childhood possessions: a swimsuit, inspired by the 1989 film, "The Little Mermaid." 

In a plastic pool in late 90s, Castro Valley, California, I would spend hours baking under the gaze of an overzealous sun, grieving the mythos of creatures that existed only in daydreams. However, nearly six thousand miles away, on the Island of Jeju, mermaids were very much a reality. 

Photo Credit: UNxArtPartner Create COP25 Haenyeo 2019

The sea women

Evidence of female free divers, or haenyeos (Korean:해녀), first appears in literature dating to the 17th Century. What began as a solely male-dominated field soon shifted into one of the quintessential representations of semi-matriarchal family structure in Asia. To become a haenyeo, women must join a fishing village cooperative, requiring the agreement of other members, and diving rights are often passed on from elderly haenyeo to their daughters and daughters-in-law. 

Diving barehanded, clad in simple cotton mulsojungi, without oxygen tanks or other technological adornments, these women routinely plunge their bodies into the gelid waters off the southernmost coast of the Korean peninsula. For seven hours a day, 90 days a year, haenyeo dive up to 20 meters below the surface to harvest marine resources, including abalone, other mollusks, octopi, sea urchin, seaweed, turban shells, and other shellfish for their families and the community. The spirit of the haenyeo is communal, "The women seek equitable distribution of their harvest, giving away part of their catch to a diver who has a poor catch. Such favors are always returned by the recipient."

As Dr. Ji-In Kim notes, the lifestyle is not without its dangers:

These divers are [also] exposed to decompression sickness because they perform breath-hold dives, and these dives can cause neurological problems, such as muscle weakness and dysthesia, as well as other symptoms, such as vertigo, dizziness, and nausea. In addition, increases in intraocular pressure while diving damage the optic nerves and lead to headaches. Among this group, 83.5% take analgesics and antihistamines during work to prevent the headaches and earaches that occur due to diving, and they often take more than the recommended doses; thus, drug overdose is a serious problem. 

Photo Credit: Blog Duam 

Translating the currents

The adversities, however, have paired with marvels. According to a new study in Cell Reports, generations of diving has literally altered the genetics of divers and their children, passing down a series of psychological adaptations allowing them to dive more safely. Dr. Melissa Lardo and her team observed that:

Haenyeo's heart rates drop[ped] about 50 percent more during simulated dives compared with other groups, which helps them hold their breath longer by limiting oxygen that the body needs and reducing the work the heart needs and reducing the work the heart needs to do...This blood pressure genetic variant can protect the haenyeo as they dive while pregnant-typically, pregnant haenyeo will dive up until the day they give birth, says Ilardo. Researchers suggest this lower blood pressure genetic variant could protect against complications like preeclampsia, a health risk for pregnant women that can be exacerbated by diving. 

Centuries of diving has not only changed the anatomy of their bodies; it has embedded in them, what Dr. Samantha Chisolm Hatfield calls Traditional Ecological Knowledge (TEK). 

TEK "specifically relates to the environment in a given traditional homeland of Indigenous groups and/or Usual and Accustomed areas. This may include but is not limited to: botany knowledge, medicinal application (collection and/or administration), hunting, fishing, gathering, processing of materials(s), caretaking such as burning, coppicing, thinning, astronomy, phenology, time, ecological markers, species markers, weather, and climate knowledge."

In a paper published in the Journal of Marine Island Cultures, Hatfield and Dr. Sung-Hee Kong interviewed haenyeo and concluded that they have highly developed environmental acuity, a unique ability to read environments and document information on environmental changes. This is particularly vital as the collection of resources has steadily declined, and sustainability efforts are necessary to mitigate the ravages of climate change. 

Photo Credit: Bernard Gagnon

The ebbing tide 

After thousands of years, the mermaids of Jeju face extinction. "The practice is dying out. Young women are no longer continuing this matrilineal tradition; the current group of haenyeo divers, with an average age of around 70 years years may represent the last generation." The recalibrated values of a modern Korea are looking increasingly incompatible, threatening to erase the women of Jeju and their stewardship of the peninsula's marine ecology. 

Photo Credit: Peter Chanovec

A coruscation of hope

However, as in all fairy tales, the hope of happy ending remains. In 2016, the haenyeo were included on the UNESCO List of Intangible Cultural Heritage and just this month, haenyeo was added to the Oxford English Dictionary, which many hope will raise awareness for this vanishing way of life. Furthermore, although the population continues to dwindle, younger generations are beginning to answer the haenyeo's siren song. Together, these factors may protect the last of the mermaids. 

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