Cadborosaurus is a sea serpent from the folklore of the Pacific Northwest coast, reported from Alaska down to San Francisco Bay but centred on the waters around Vancouver Island and the Salish Sea. Witness descriptions are remarkably consistent across decades: a long serpentine body showing vertical humps or coils at the surface, a head often compared to a horse or camel, a long flexible neck, front flippers, and a fan- or fluke-like tail. Reported lengths run from about 5 metres for claimed juveniles up to 15–20 metres or more for adults, and its swimming motion is described as an up-and-down undulation — unlike the side-to-side motion of fish and sharks.
The name arrived in 1933, when a wave of sightings near Cadboro Bay outside Victoria made front-page news. Major H.W. Langley, clerk of the BC Legislature, and F.W. Kemp of the provincial archives were among the first credible witnesses of the modern era, and Victoria Daily Times editor Archie Wills coined "Cadborosaurus" — the lizard of Cadboro Bay — with the friendlier nickname "Caddy" following close behind. Coastal fishermen had suggested naming it "Old Hiaschuckaluck" after existing First Nations tradition, a reminder that the creature was already ancient news to the people of this coast.
The story took its strangest turn in 1937, when whalers at the Naden Harbour station in Haida Gwaii pulled a carcass roughly 3 to 3.8 metres long from the stomach of a sperm whale — camel-like head, serpentine body, fin-like appendages. It was photographed, described, sampled, and then lost. The BC Provincial Museum's director tentatively called the sample a fetal baleen whale, but the photographs kept the debate alive for decades. In 1995, oceanographer Dr. Paul LeBlond of UBC and zoologist Dr. Edward Bousfield went as far as formally proposing a new species, Cadborosaurus willsi, in a published paper — an almost unheard-of step for a cryptid, and one that keeps Caddy in a different category from most campfire monsters.
Cryptid status: No specimen of Cadborosaurus has ever been confirmed. Mainstream explanations include sea lions swimming in single file (which convincingly mimic a humped serpent — a 1943 Georgia Strait "serpent" resolved into a herd of sea lions under binoculars), giant oarfish, conger eels, elephant seals, and basking shark carcasses. Believers respond that no single known animal accounts for every feature reported across roughly 300 sightings. Either way, Caddy is a genuine piece of British Columbia's cultural history.