Along the rugged Pacific coast of British Columbia, where deep water surrounds Vancouver Island and fog can transform familiar shapes into something altogether stranger, stories have circulated for generations about an unusual creature swimming beneath the surface. It has supposedly been seen by fishermen, sailors and people watching from shore. Sometimes only a series of humps appears above the water. Other witnesses describe a long neck and small head rising from the sea before disappearing again.
The creature has become known as Cadborosaurus or, much more affectionately, simply “Caddy.”
The name Cadborosaurus comes from Cadboro Bay, near Victoria on Vancouver Island, an area closely associated with reports of the creature. Researchers eventually gave it the scientific-sounding name Cadborosaurus willsi, although it is important to make one distinction from the beginning: Cadborosaurus is not recognized by mainstream zoology as a scientifically established species. No verified specimen has ever demonstrated that Caddy exists.
That hasn’t stopped people from reporting it.
Descriptions vary considerably, as they often do with cryptids. Caddy is generally described as having an extraordinarily long, serpentine body with a relatively small head and long neck. Witnesses sometimes report humps or coils appearing above the surface as the creature swims. Some accounts mention flippers, while others describe a strange tail. Perhaps Caddy’s most distinctive alleged feature is its head. Rather than the head of a conventional snake or fish, witnesses have compared it to that of a horse, camel or even a sheep.
Its reported size is equally difficult to pin down. Some witnesses have estimated the animal at perhaps 15 or 20 feet long. Others have described something considerably larger, with some spectacular estimates approaching 60 feet.
Whatever Caddy is supposed to be, the stories didn’t simply appear out of nowhere in the late twentieth century. Accounts of strange marine creatures along the Pacific Northwest coast have existed for a very long time. Indigenous cultures of the region also have traditions involving powerful beings associated with oceans and waterways.
Those traditions need to be treated separately and respectfully, however. It would be misleading to take an Indigenous cultural or spiritual being and simply declare it an early “Cadborosaurus sighting.” Caddy is a modern cryptozoological interpretation, while Indigenous traditions have their own histories, meanings and cultural significance.
The modern Caddy legend began gaining momentum during the early twentieth century as newspapers reported unusual encounters with long, unidentified animals in the waters around British Columbia. Fishermen and sailors described creatures that they insisted didn’t resemble the whales, seals and other marine animals they knew.
Then, in 1937, something happened that would become one of the most famous pieces of supposed evidence in the entire Cadborosaurus mystery.
At a whaling station at Naden Harbour on Haida Gwaii, workers reportedly opened the stomach of a sperm whale and discovered the remains of a strange animal inside.
Someone took photographs.
The resulting images show a bizarre elongated carcass laid out for examination. It appears to have a relatively small head, a long neck or front portion of the body and structures that have sometimes been interpreted as flippers.
For believers, the photographs seemed almost too good to be true.
Perhaps Caddy wasn’t merely something people occasionally glimpsed disappearing beneath the waves. Perhaps an actual Cadborosaurus had finally been recovered or, more precisely, recovered from the stomach of an animal that had apparently eaten it.
There was just one enormous problem.
The specimen wasn’t preserved for future scientific examination.
That means there is no tissue to test, no DNA to analyze and no intact body that modern zoologists can examine. Researchers are left with old photographs and descriptions of something that disappeared decades ago.
Alternative explanations have subsequently been proposed for the Naden Harbour carcass. One particularly interesting possibility is that it was the partially digested remains of a known marine animal, perhaps even a baleen whale fetus. Decomposition and digestion can dramatically alter an animal’s appearance, sometimes producing something that looks almost nothing like the creature did when alive.
Without the original specimen, there is no way to perform the testing that could settle the argument.
The photographs therefore remain fascinating.
But they aren’t proof.
Caddy gained some serious advocates nevertheless. Among the best known were marine biologist Edward Bousfield and researcher Paul LeBlond, who examined historical reports and argued that there was enough consistency among sightings to consider the possibility that witnesses were encountering a genuine unidentified animal.
The name Cadborosaurus willsi emerged from those efforts.
Over the years, additional reports continued.
Some witnesses described seeing a long creature moving alongside boats. Others reported several humps appearing one after another across the surface of the water. Occasionally someone claimed to see a head and neck actually rise above the sea.
Those reports inevitably raise the question at the heart of every cryptid story.
If Caddy isn’t an unknown species, what are people seeing?
There are plenty of possibilities.
Sea lions are among the most convincing.
Several sea lions travelling together can create a remarkably deceptive silhouette. Imagine looking across choppy water from a considerable distance. One animal’s head appears above the surface. Behind it, several backs rise and disappear in succession.
The human brain naturally tries to connect those shapes.
Instead of seeing several individual animals, someone might perceive one enormous creature with a head followed by a series of humps.
Whales can create similar confusion. Only small portions of their bodies may be visible at any given moment, and distance, waves and poor lighting can make even familiar animals surprisingly difficult to identify.
Another favourite candidate is the oarfish.
Oarfish are real animals, and they look like something invented specifically to frighten sailors. They are extraordinarily long, ribbon-shaped fish capable of reaching lengths exceeding 20 feet. Rarely encountered alive near the surface, an oarfish could certainly contribute to historical stories about sea serpents.
Unfortunately, its anatomy and behaviour don’t match every Caddy report particularly well.
Other explanations include sharks, floating logs, masses of kelp and unusual wave formations. In some cases, there may not be one explanation at all.
That possibility is important.
The hundreds of reports attributed to Cadborosaurus don’t necessarily describe the same thing.
One person may have seen sea lions.
Another could have seen a whale.
Someone else might have encountered an unusually large fish.
Another witness might simply have watched a floating log moving strangely with the current.
Over decades, those unrelated encounters could gradually have merged into the story of one legendary creature.
Yet there is one aspect of the Caddy mystery that continues to intrigue believers.
Some witnesses weren’t inexperienced tourists seeing the Pacific Ocean for the first time. Reports have come from fishermen, sailors and other people accustomed to the marine wildlife of British Columbia. Some insisted that whatever they saw was unlike any animal they normally encountered.
That doesn’t mean they couldn’t have been mistaken. Experienced observers can misidentify animals too, especially when something is seen only briefly, from a distance or in rough water.
But those accounts are considerably harder to dismiss than a fleeting glimpse from someone unfamiliar with the area.
There have also been photographs and purported videos over the years, but none has provided the kind of unmistakable anatomical detail that would establish the existence of a previously unknown large marine species.
And that is where the Cadborosaurus mystery remains.
There are eyewitness accounts.
There are old newspaper stories.
There are photographs of the strange Naden Harbour carcass.
There are researchers who became convinced that something genuinely unusual was swimming along the Pacific coast.
What there isn’t is the evidence science ultimately needs.
No confirmed skeleton has been recovered.
No verified tissue sample exists.
No usable DNA has established an unknown species.
No intact body has been examined.
And no living Cadborosaurus has been documented clearly enough to demonstrate that Caddy is anything more than a collection of intriguing sightings.
Still, Cadborosaurus has something going for it that many cryptids don’t.
If you’re going to hide a large unidentified animal somewhere, the Pacific Ocean isn’t a terrible choice.
The waters surrounding British Columbia are vast and deep, and marine science continues to encounter animals that are rarely observed alive. Strange creatures genuinely do live beneath the surface, and some spend most of their lives well beyond ordinary human observation.
That doesn’t mean a 40-foot horse-headed sea serpent is cruising around Vancouver Island unnoticed.
But it leaves just enough room for the question.
Perhaps Caddy is nothing more than seals, whales, fish, floating debris and tricks of perspective that gradually became woven together into one enduring legend.
Perhaps the mysterious carcass recovered in 1937 belonged to an ordinary animal made extraordinary by decomposition and digestion.
Perhaps generations of witnesses simply saw things they couldn’t immediately identify.
Or perhaps, somewhere beneath the cold waters of the Pacific, there really is something we haven’t properly identified yet.
Until someone produces an actual specimen, Cadborosaurus will remain exactly where Caddy has been for generations—somewhere between zoology and folklore, occasionally breaking the surface just long enough to make someone wonder what they saw before disappearing once again beneath the waves.
And maybe that’s exactly why, nearly a century after that strange carcass was photographed in northern British Columbia, people are still looking for Caddy.
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