Before modern marine biology, the sea was not just water. It was a borderland.
Sailors returned with reports of strange creatures. Scholars recorded what they heard. Artists drew what they imagined. Over time, some sightings became part of natural history, while others entered folklore.
Three of the strangest examples are the Sea Monk, the Sea Bishop, and the Water Man.
The first two became famous in early modern Europe. The third appears in Islamic heritage under names such as Sheikh al-Bahr, meaning the Elder of the Sea, or al-Insan al-Ma’i, the Water Man.
They are not the same creature. But they belong to the same world: a time when the ocean still carried mystery, fear and religious meaning.
The Sea Monk
The Sea Monk became one of the most famous sea-monster reports of 16th-century Europe.
European naturalists described it as a strange marine creature whose shape resembled a monk. It was said to have a head like a shaved monk, a body like a fish and a form that reminded observers of religious clothing. The creature appeared in works by major Renaissance naturalists, including Pierre Belon in 1553, Guillaume Rondelet in 1554 and Conrad Gesner in 1558. Smithsonian Magazine notes that the Sea Monk became widely discussed in European natural history circles, even though the naturalists who described it had not personally examined the specimen.
The supposed creature was reported somewhere around the Øresund, the strait between modern Denmark and Sweden, sometime between 1545 and 1550. Later researchers suggested several possible explanations: an angel shark, an anglerfish, a seal, a walrus, a squid, or even a manipulated dried ray known as a Jenny Haniver.
The important point is this: the Sea Monk shows how early naturalists tried to classify the unknown. They were not simply writing fairy tales. They were working with sailor reports, sketches, religious imagination and limited zoological knowledge.
The Sea Bishop
The Sea Bishop, also known as the Bishop Fish, was another religious-looking sea creature from European lore.
Like the Sea Monk, it was described as a marine being whose form resembled a religious figure. Instead of a monk’s hood, it appeared to have the shape of a bishop’s mitre and robe.
Corpus Christi College Oxford notes that both the Sea Monk and Sea Bishop appeared in 16th-century natural history, including Rondelet’s Libri de piscibus marinis from 1554. Rondelet included illustrations while also admitting that such reports could be exaggerated and that he would not fully affirm or deny the creatures’ existence.
This hesitation is important.
Even in the 16th century, serious writers knew that sea reports could be unreliable. Sailors saw strange things. Stories grew. Drawings became more dramatic. A real animal could turn into a monster by the time it reached a manuscript.
Some scholars now suggest that supposed Sea Monks or Sea Bishops may have come from rays, skates or sharks whose bodies were altered, dried or interpreted in human-like ways. Corpus Christi College Oxford notes that modified rays, known as Jenny Hanivers, were used for centuries to create “mermaid” or monster-like specimens.
The Water Man in Islamic Heritage
Islamic heritage also contains reports of human-like sea beings.
One of the most striking is the Water Man, or al-Insan al-Ma’i. In Arabic and Persian manuscript traditions, related figures appear under names such as Sheikh al-Bahr, the Sea Shaykh.
A folio in the Walters Art Museum from an Ottoman Turkish version of al-Qazwini’s Wonders of Creation depicts Shaykh al-Bahr, the Sheik of the Sea, alongside Insan-i Barr, the Man of the Desert. The manuscript is connected to Zakariya ibn Muhammad al-Qazwini, one of the most famous authors of Islamic cosmography.
Al-Qazwini’s Wonders of Creation and the Oddities of Existence was one of the most influential works of medieval Islamic cosmography. The University of Sydney describes it as a late 13th-century work that gathered scientific knowledge, astrology, folklore and travel tales into a single vision of the created world.
This is the correct context for the Water Man.
He belongs to the literature of wonders, geography and natural history. Such texts recorded animals, strange peoples, rare lands, sea reports and marvels that were meant to provoke awe at creation.
The Water Man was not presented in the same category as Qur’an or authentic hadith. He was part of inherited maritime reporting and scholarly curiosity.
Al-Damiri and the World of Animal Literature
Another key source for strange creatures in Islamic heritage is al-Damiri’s Hayat al-Hayawan, the Life of Animals.
Al-Damiri died in 808 AH / 1405 CE, and his zoological work became one of the best-known animal encyclopaedias in the Islamic world. The US National Library of Medicine describes an important manuscript copy of Hayat al-Hayawan as a complete copy of the long version, transcribed before the author’s death.
Works like al-Damiri’s did not function like modern biology textbooks. They often combined zoology, hadith reports, Arabic language, poetry, law, folklore and transmitted accounts. That is why unusual beings such as the Water Man could appear alongside animals known to ordinary readers.
The aim was not only classification. It was also moral reflection, linguistic preservation and wonder at the diversity of creation.
Same Sea, Different Imagination
The Sea Monk and Sea Bishop emerged from Christian Europe. The Water Man emerged from Islamic and Arabic-Persian heritage.
But the pattern is similar.
A strange sea creature is reported.
Its body is compared to a human form.
Writers give it a religious or social name.
Artists illustrate it.
Later generations ask whether it was real, exaggerated or misunderstood.
The difference is in the cultural lens.
Europe saw monks and bishops.
Islamic sources saw a sea elder, a water man, or a being from the edge of creation.
In both cases, the sea became a mirror. People interpreted what they saw through the symbols they already knew.
Were These Creatures Real?
There is no confirmed modern species matching the full legendary descriptions of the Sea Monk, Sea Bishop or Water Man.
The most likely explanations vary.
Some may have been misidentified marine animals, such as sharks, rays, seals, squid or manatees.
Some may have been damaged carcasses seen after storms.
Some may have been exaggerated sailor reports.
Some may have been manufactured curiosities, especially in Europe, where dried rays and skates were sometimes altered into monster-like shapes.
The Sea Monk, for example, has been linked by modern researchers to the angel shark, although certainty is impossible because the original specimen is lost.
The Water Man is harder to assess because the reports belong to broader Islamic wonder literature rather than a preserved specimen or modern biological record.
Why These Stories Matter
These stories matter because they reveal how earlier civilisations dealt with the unknown.
They did not have underwater cameras, modern taxonomy or deep-sea research vessels. They had sailors, travellers, scholars, artists and manuscripts.
The sea was vast.
The reports were imperfect.
The imagination filled the gaps.
That does not mean the past was foolish. It means earlier scholars worked with the evidence, testimony and worldview available to them.
Some reports were wrong. Some were exaggerated. Some may have been based on real animals. Some became symbolic.
Together, they show the early history of human curiosity about the ocean.
Conclusion
The Sea Monk, Sea Bishop and Water Man stand at the meeting point of sea travel, folklore, religion and early natural history.
The Sea Monk and Sea Bishop show how Renaissance Europe turned unusual marine reports into religious-looking sea monsters.
The Water Man shows how Islamic heritage preserved strange accounts from the ocean within works of wonders, cosmography and animal literature.
None of these reports should be treated as confirmed revelation.
But none should be dismissed as meaningless either.
They are records of how earlier people looked at the sea: with fear, curiosity and a sense that creation still contained secrets beyond human reach.
