Cadborosaurus: The Sea Serpent of the Pacific Northwest

You are on a sailboat in a quiet bay near Victoria, British Columbia, when something long and dark humps up out of the water off the bow, holds a horse-like head above the surface on a slender neck, watches you for a moment, and slides under without a splash. You did not see a log; logs do not turn their heads. That is the encounter reported, in one form or another, up and down this coast for a century.

Cadborosaurus, nicknamed Caddy, takes its name from Cadboro Bay near Victoria, where sightings clustered in the 1930s. The creature of the reports is a long, serpentine animal, often described with a head like a horse or camel, a maned or humped back showing in coils above the water, and a habit of moving fast. British Columbia and Washington State newspapers gave it steady coverage through the 1930s, and the name Cadborosaurus was coined by a local editor in 1933. Indigenous traditions of the region long featured serpent and sea-monster beings, and cryptozoologists point to those as older layers of the same coastal lore.

The Naden Harbour carcass

The single most cited piece of evidence is a carcass. In 1937, at a whaling station in Naden Harbour on Haida Gwaii (then the Queen Charlotte Islands), workers cut open a sperm whale and found, in its stomach, the partially digested remains of a long, unusual creature. It was photographed before being lost, and the photographs, showing something roughly ten feet long with a slender body and an odd head, are still passed around as the best "Caddy" documentation. Because the specimen itself was never preserved for science, the photos are all that survive, and photos of a damaged, partly digested animal are notoriously easy to misread.

Zoologists Paul LeBlond and Edward Bousfield collected hundreds of eyewitness reports and even proposed a formal name, Cadborosaurus willsi, arguing for a genuine unknown marine reptile or mammal. Mainstream science was not persuaded, and for good reason: no body, no bones, no specimen has ever reached a laboratory.

What people are probably seeing

The likely explanations are the same ones that dissolve most sea-serpent sightings. A line of harbor porpoises or a swimming string of sea lions can look, at a distance, like a single humped body undulating through the water. Large fish such as oarfish, basking sharks in decomposition, giant kelp fronds, floating logs, and pipefish have all been offered for specific reports. The famous carcass may have been a decomposing shark, a fetal baleen whale, or another mangled sea animal reduced by digestion to something unrecognizable, a class of blob known to washed-up-monster lore as a globster.

The tidy explanations handle the bulk of the sightings and probably the carcass too. What they handle less comfortably is the consistency: coast dwellers, fishermen, and sober witnesses over many decades describing the same horse-headed, long-necked shape in the same waters, sometimes at close range in calm conditions where porpoises and logs are hard to mistake. Consistency is not proof, and folklore breeds its own template. But a specific, dated, close sighting from someone with no reason to invent it is the residue that keeps Caddy off the fully-closed list.

Below, readers have filed their own encounters with things in the water that did not behave like anything they could name, and voted each True, Fake, or Not sure. Scan the bay, keep your doubt, and add your verdict.