When you think of mermaids, you probably picture a glittering tail and a haunting song, but the ocean is brimming with far stranger, more unsettling humanoid legends. In this roundup of 10 legends aquatic, we plunge into ten eerie water‑dwelling figures from every corner of the globe, each with its own haunting backstory, bizarre quirks, and occasional grain of truth.

10 Adaro

The sea can be a merciless realm. When sailors vanished for too long, madness often set in. Children who defied their parents sometimes slipped into the water without a splash, as if an unseen force stole their will to survive. In the Solomon Islands, locals blamed this eerie phenomenon on the adaro. This creature is described as a hairless, black‑eyed man‑faced being, gray‑scaled from waist up, ending in a shark‑like tail and breathing through gills tucked behind its ears.

Legend says the adaro lurks, waiting for unsuspecting victims to plunge. If a sinner drowns, the creature supposedly siphons away the good parts of their soul—called the “shade”—leaving only the darkest aspects behind. Christian missionaries later re‑interpreted the myth, casting the adaro as fallen angels or demonic entities.

9 Rusalki

Russian folklore tells of the rusalki (singular: rusalka), ethereal, naked maidens who rise from rivers to moisten fields and nurture the earth. These spirits weren’t mermaids but once‑living women. Early tales claim they were the ghosts of women who drowned after taking their own lives out of grief for a lost child or husband. They were once portrayed as beautiful, helpful spirits who sang, giggled, and brushed their hair by the water’s edge.

Later stories turned the rusalki into zombie‑like revenants—women murdered and dumped in lakes and rivers. These vengeful figures would crawl ashore to exact revenge on the men who killed them, reshaping the myth from benevolent water‑nymphs to terrifying aquatic avengers.

8 Yacuruna

Deep within the Amazon’s verdant canopy, indigenous peoples speak of the yacuruna, a race of underwater dwellers whose cities mirror the world above, only inverted. Their crystal palaces glitter with pearls and fish scales, and they travel atop snakes, crocodiles, and turtles.

These beings resemble humans, but their heads, hands, and feet are reversed. Some accounts simply describe them as green‑skinned humanoids with webbed extremities. Legends warn that anyone captured by a yacuruna begins to transform, starting with eyes that roll backward, and only a shaman can reverse the curse. Some even credit the yacuruna with the origin of shamanic medical knowledge.

One tale follows Don Juan Flores Salazar, who as a child watched his sister drown. Years later, a vision of her—now an adult married to a yacuruna—appeared at a water’s edge, offering him healing wisdom. Salazar went on to become a renowned shaman, guided by that otherworldly encounter.

7 Finfolk

In the mist‑shrouded coasts of Scotland and Ireland, the finfolk legend thrived. During winter they were said to inhabit a submerged city called Finfolkaheem, while in summer they retreated to a phantom island named Hildaland, which could appear and vanish at will—making it impossible for mortals to locate.

The finfolk were believed to shapeshift into stunning men and women, luring unsuspecting humans into the sea. They existed somewhere between full fish and full human, a hybrid akin to the classic mermaid. Their motive? To consummate with humans, believing that such unions granted them a form of eternal life. Any vessel that failed to return or any drowning tragedy was blamed on these seductive sea‑folk. After Christianity spread, priests claimed that devout villages, firmly rooted in the Bible, could keep the finfolk from stepping onto dry land.

6 Umibozu

Sailing under a moonlit sky can be unnerving, even on calm seas. Japanese sailors sometimes reported glancing over still waters at night and seeing a massive, bald, black silhouette—a figure they called the umibozu, literally “sea monk.” This ominous apparition was taken as a warning that a storm was brewing, urging mariners to stay ashore.

Other tales recount ships on seemingly placid waters suddenly being dragged down, with the crew witnessing the looming black form from the shore. Modern scholars suggest the legend may stem from rogue waves—sudden, towering walls of water that can appear out of calm conditions. At night, such a wave might resemble a dark, human‑shaped outline, perfectly aligning with the umibozu myth.

5 Monk Fish And Bishop Fish

In the 1500s, sailors and fishermen from Denmark and Poland reported encounters with a fish bearing a human face. The creature’s head resembled a bishop’s mitre, and its torso seemed cloaked, leading to the names “monk fish” and “bishop fish.” These accounts emerged when marine biology was still nascent, and even massive whales were relegated to folklore.

One story tells of fishermen capturing a “monk fish” and, convinced it was a holy sea‑dweller, transporting it to a church in hopes of eliciting a divine reaction. Of course, the fish remained silent, solidifying its status as a cryptozoological curiosity, often illustrated as a near‑human figure.

Today, the genus Lophius carries the nickname “monkfish.” These real fish possess large, pink‑inside mouths that evoke a human tongue, and their forward‑facing eyes give them a vaguely anthropomorphic appearance, keeping the legend alive in modern marine circles.

4 The Ipupiara

The Ipupiara, a South American sea monster, was said to be a hulking, hair‑covered beast with a massive mustache. Legend claimed it strangled sailors off Brazil’s coast with its massive hands, then devoured their eyeballs, fingertips, toes, and even genitals. In the 1500s, explorers reported killing the creature by thrusting a sword into its belly and selling the corpse to Danish physician Thomas Bartholin, who examined it and confirmed a human‑like head and torso but fish‑like lower limbs. Bartholin displayed it in his cabinet of curiosities.

Modern theorists propose that the Ipupiara story may stem from a rare deformity called sirenomelia, where a child’s legs are fused into a tail‑like structure. In the era’s harsh reality, disabled infants were often abandoned, possibly leading to feral survival and the birth of such macabre legends. Some suggest the entire tale could be an elaborate hoax, given that babies with sirenomelia rarely survive beyond a day or two.

3 Vodyanoy

In Slavic myth, Vodyanoy stands as the water’s guardian spirit. Portrayed as a wise old man wielding dominion over every aquatic creature, he rewards those who treat water with reverence—granting them plentiful fish and precious pearls. He rides a “water horse,” actually a massive catfish, across his watery realm.

Illustrations depict Vodyanoy with a human‑shaped body and webbed hands, but his head resembles a frog’s, complete with a human nose. His beard drips with algae and slime, and he can shapeshift into a man at will. He loves human fare, and ancient peoples offered him meals as tribute. When he leaves the water to satisfy his cravings, his left butt cheek perpetually drips water, making him easy to spot in a crowd.

2 Oannes

Ancient Babylonian lore introduces Oannes, an amphibious deity resembling a merman with a flowing beard, donning a fish‑shaped hood. Imagine a man hollowed out of a gigantic fish carcass, standing upright on land. Some depictions even show him with human feet protruding from the fish’s lower half, blurring the line between deity and oddity.

According to myth, humanity needed guidance to rebuild civilization after cataclysmic events. Oannes rose from the sea to impart arts, sciences, and knowledge to humankind, who listened intently. At day’s end, he would plunge back into the ocean, disappearing beneath the waves. A Hebrew variant ties his teachings to Noah, who received divine instruction after the Flood to restore civilization.

1 The Man Fish

In 1679, Spanish sailors off the coast of Cantabria hauled a naked, mute man from the sea. They fed him wine and food, hoping he’d be a shipwreck survivor, but he fell ill instantly and fled back into the ocean. Another version tells of a teenage boy forced to dive for treasure, presumed drowned, only to be rescued five years later. Recognized by townsfolk, he was taken home, but the strain of terrestrial life proved too great, prompting his return to the sea.

Contemporary writers used the tale to argue that humans could adapt to any environment, even sprouting gills to thrive underwater. A statue commemorating the “fish man” now stands in Lierganes, Cantabria, honoring the eerie legend.

Shannon Quinn, a writer and entrepreneur from Philadelphia, contributed this fascinating collection of aquatic lore.

When it comes to the strange lights that dance across the night sky, most of us think of anonymous orbs and fleeting glints. Yet a handful of cases go a step further – they involve actual humanoid figures stepping out of those mysterious vessels. Below, we count down the most compelling ten UFO encounters that feature alien humanoid entities, each one more bewildering than the last.

10 The Imjarvi Incident

On a frosty January afternoon in 1970, two seasoned Finnish skiers, Aarno Heinonen and Esko Viljo, paused at a familiar clearing near Imjarvi. A low humming filled the air, growing louder as a bright object surged toward them. When the craft hovered just three meters away, it released a strange red‑gray mist that enveloped everything. A blinding flash erupted from beneath the vessel, temporarily wiping out the men’s vision.

Regaining sight, Heinonen felt an invisible force yank him backward, nearly sending him sprawling. As he steadied himself, a diminutive, child‑sized humanoid stood bathed in the luminous tube, clutching a black box that glowed with an internal yellow light. The being directed the box toward Heinonen, spewing more mist and sparks. The mist thickened, the light intensified, and in an instant the craft and its passenger vanished, leaving Heinonen with a numb right leg and a baffling episode of black urine.

While many researchers deem the incident authentic, Heinonen’s later claims of encounters with “blond alien women” have tarnished his credibility among skeptics.

9 The Kinnula Encounters

Just a year after the Imjarvi episode, February 1971 brought two separate sightings in Kinnula, Finland. At roughly 8 p.m., a pair of women driving toward Oulu noticed a strange light tailing their vehicle. When the light caught up, it vanished, leaving a 90‑centimeter‑tall humanoid dressed in a brown‑green suit and tight helmet standing beside the road. The figure stared briefly before slipping into the surrounding woods.

Three days later, lumberjacks Petter Aliranta and Esko Sneck were wrapping up work when a silver disc settled in a clearing. From it emerged a meter‑tall humanoid clad in a green one‑piece suit with a scuba‑style helmet. When Sneck brandished his chainsaw, the being retreated, only to be pursued by the men. Aliranta managed to grasp the creature’s heel, feeling a wave of pain surge through his body. The silver disc then lifted, shooting upward and disappearing.

8 The Luumaki Encounter

Travel back to the summer of 1965 in the Finnish hamlet of Luumaki, where the Kuningas family were busy picking blueberries. While spreading out to cover more ground, father Matti heard a bubbling sound from above. Looking up, he saw a man‑like silhouette perched on a rocky slope, its orange, thick skin glistening in the sunlight. The creature, about 100 centimeters tall and robust, fixed its gaze on Matti before moving toward him.

Rooted to the spot, Matti watched the being draw ever nearer, his legs refusing to obey. When the entity reached only a few yards away, it vanished into thin air. Their youngest son, Teuvo, later claimed to have seen the same figure approach his father from the opposite side of the field, only for it to disappear just as suddenly.

7 The Salzburg Abduction

In the winter of 1951, an American soldier stationed near Salzburg, Austria, took a shortcut through a deserted brushway after his shift ended. At roughly 11 p.m., a dark humanoid emerged from the shadows, pointing an unseen device that instantly paralyzed him. The figure attached a strange black patch to the soldier’s torso and, using the device, hauled him toward a waiting craft as if by an invisible rope.

Inside the ship, the soldier reported a transparent chamber and described his captor as a 152‑centimeter‑tall, bald, pale‑skinned being with eyes that resembled “a fly’s eyes within eyes.” The craft allegedly lifted off, journeyed to a paradisiacal planet—perhaps Mars—before returning the soldier to the exact spot of the abduction. Investigators who interviewed him repeatedly tried to expose inconsistencies, yet he remained steadfast.

6 The Encounter Of Filiberto Cardenas

On the evening of January 3, 1979, Filiberto Cardenas and his friend Fernando were cruising the outskirts of Miami in search of a pig for a barbecue. Their car sputtered and stopped, prompting them to pop the hood. While inspecting the engine, a humming sound rose from above, accompanied by dazzling lights that bathed the vehicle. Both men felt an overwhelming paralysis.

Suddenly, Filiberto was lifted into a bright column of light emanating from the craft, vanishing before Fernando’s eyes. He reappeared two hours later, 16 kilometers away on a busy road, bewildered but unharmed. Police took him into custody, later releasing him after confirming his identity. In a hypnotic regression session months later, Filiberto recounted being strapped to a seat, a suction device attached to his back, and small needles piercing his skull. The aliens communicated in several languages before settling on Spanish, which he understood.

He also claimed the beings transmitted future events: a catastrophic earthquake in Mexico City (which struck in 1985) and the submergence of major Californian cities, predictions later echoed in a 1983 Newsweek article. Additionally, he foresaw Ronald Reagan’s presidency and the AIDS epidemic.

5 The Abduction Somewhere Between Columbus And Mansfield

Amid a wave of 1973 humanoid sightings, a driver on Ohio’s I‑71 observed a strange light trailing his car in late September. After a brief blackout, he found himself on a lone dirt road, inexplicably steering off the highway. Suddenly, three entities surrounded his vehicle as a massive UFO descended.

The next memory was of being strapped to a table, surrounded by the beings who examined his body. One placed a device near his head, unleashing a blinding flash. He awoke back in his speeding car on the highway, with an hour of missing time to account for.

4 The Boianai Visitants Over Papua New Guinea

During the summer of 1959, missionary Father William Gill and 37 witnesses gathered near Boianai, Papua New Guinea, to watch strange lights. Over two evenings, four humanoid figures emerged from the crafts, waving at the crowd. Professionals—including doctors and teachers—were among the observers, lending credibility to the event.

The visitors responded to the crowd’s Morse‑code signals with flashes from their ships, creating a back‑and‑forth light dialogue. While many investigators concluded the beings were extraterrestrial, Gill believed they were human, perhaps part of a secret military project.

3 The Emilcin Encounter

May 10, 1978, found 71‑year‑old Jan Wolski driving a horse‑drawn cart through a Polish forest near Emilcin. He encountered two black‑clad humanoids, each about 152 centimeters tall, with light‑green hands and faces. As he passed, the figures hopped onto his wagon, positioning themselves behind him.

Moments later, a massive silver‑white, bus‑shaped craft hovered overhead. Wolski entered via a lift, where one being placed two gray discs over his body, likely scanning him. After a brief examination, the entities bowed, and he exited, thanking them. Opinions remain split on the veracity of the encounter, though a stone monument now marks the site.

2 The 1996 Fife Incident

On September 23, 1996, Mary Morrison (a pseudonym), her friend Jane, and Mary’s son Peter set out for coffee in Fife, Scotland. Around 8 p.m., a bright light split in two as they drove, revealing a massive triangular craft with red underside lights hovering overhead before vanishing.

On the return trip, the craft reappeared, hovering close to their car. After reporting the sighting, they, along with Mary’s daughter Susan, returned to the location at an investigator’s request. They observed a lit area at a field’s edge, where thin figures moved back and forth, each carrying a cube‑like object. A cocoon‑shaped capsule then rushed toward them, after which a hypnotic regression suggested an abduction occurred before they were returned to their car.

1 The Corroborative Sighting Of Edith Boatright

On the frigid night of February 21, 1973, a high‑school basketball team from Piedmont, Missouri, lost a playoff game and drove home along Highway 60. Coach, staff, and three players witnessed a dazzling craft hovering over a field for several minutes. Simultaneously, Edith Boatright, lying in bed 19 kilometers away, saw a bright, flashing craft from her bedroom window.

The craft illuminated the sky with red, green, and white lights, and Edith swore she could see people moving inside. She watched the vessel for minutes before it zipped away at high speed. The proximity in time and location suggests both parties observed the same UFO, providing valuable corroboration for investigators.

10 UFO Encounters Overview

These ten accounts illustrate how the universe might be populated with beings that resemble us in form yet act in ways that baffle our understanding. From the snowy forests of Finland to the misty fields of Scotland, each story adds a unique thread to the tapestry of extraterrestrial folklore.