Cadborosaurus — Pacific Northwest Sea Serpent

Appearance

Cadborosaurs are immense but unusually slender marine animals. Their bodies are serpentine rather than whale-shaped, with flexible trunks capable of producing the sequence of humps so often described by observers at the surface. A typical adult encountered in a campaign is between 35 and 50 feet long, although sailors insist that much larger animals inhabit the deepest channels.

The creature’s most distinctive feature is its comparatively small head, set upon a long and mobile neck. Seen briefly at a distance, the head can appear horse-like, camel-like or deer-like. Dark eyes sit high on the skull, and some individuals possess a fringe of coarse hair or elongated filaments along the back of the head and neck. Others show a low serrated ridge along the spine.

Paired flippers provide fine control while the elongated posterior body and tail supply most of the animal’s thrust. Colour varies from charcoal grey and dark slate to deep green or almost black, with a paler underside. In broken light, kelp beds, rain or sea fog, the animal is remarkably difficult to distinguish from waves, driftwood and moving weed.

Behaviour and Ecology

Elusive by Nature

The cadborosaurus needs no supernatural invisibility to become legendary. Its environment already provides darkness, depth, rain, fog, waves and thousands of square miles in which to vanish. It dives steeply, turns with surprising agility for its length, and can travel beneath a boat without leaving the broad surface wake expected from an animal of its size.

Larger and more openly predatory marine animals such as the Dire Shark or Megalodon are usually easier to recognise once encountered. A cadborosaurus is dangerous partly because adventurers often do not know exactly where it is.

Historical and Mythic Context

The familiar name Cadborosaurus is modern. It derives from Cadboro Bay on Vancouver Island and entered public discussion in 1933. The shortened name Caddy followed naturally. Reports grouped beneath that name vary considerably, but recurring features include a long serpentine body, one or more apparent humps, an elevated neck, a relatively small horse-like or camel-like head and occasional descriptions of flippers, mane-like hair or a serrated back.

One of the best-known pieces of alleged evidence appeared in 1937, when photographs were taken of unusual elongated remains said to have been removed from the stomach of a sperm whale at the Naden Harbour whaling station. Those photographs later became central to arguments that the reports represented an unknown marine species, although the identity of the remains remains disputed.

In 1995, Edward L. Bousfield and Paul H. LeBlond proposed the scientific name Cadborosaurus willsi. The proposed identification was controversial, particularly because no preserved type specimen existed and the case depended heavily upon photographs and eyewitness material. Outside SpiralWorlds, Cadborosaurus therefore remains a cryptozoological claim rather than an accepted zoological species.

Not Every Sea Serpent Is Caddy

The peoples of the Pacific Northwest preserve traditions concerning many powerful beings associated with sea, river and transformation. Those traditions should not be collapsed into a modern cryptozoological label.

The Sisiutl is a distinct supernatural being within SpiralWorlds. It may inhabit some of the same broad region, but it is not simply another name for Cadborosaurus. A sailor who mistakes one for the other may discover the distinction under extremely dangerous circumstances.

Using Cadborosaurus in a Campaign

A cadborosaurus encounter works best when the animal initially appears as a mystery rather than a visible bag of hit points. Show the party a moving ridge, unexpectedly empty fishing grounds, a wake passing beneath the boat or a long neck disappearing into fog before revealing the animal itself.

• The Broken Nets. Fishing gear is being destroyed across a sheltered channel. Villagers blame a sea monster, but the cadborosaurus is trying to free a juvenile entangled in weighted nets.
• The Third Hump. Two cadborosaurs have been observed travelling through the same strait for several evenings. On the third night, three separate wakes appear.
• The Hunter’s Prize. A wealthy patron promises a fortune for proof that the great sea serpent exists. Rival hunters decide that a carcass is more valuable than an observation.
• Beneath the Keel. Something follows a vessel for several nights without attacking. The cadborosaurus is not hunting the ship. It is keeping pace with something much larger beneath it.

Combat

A cadborosaurus normally fights only when trapped, injured, protecting another of its kind or pursued beyond the point of escape. It strikes suddenly, uses its length to batter attackers aside, drags dangerous enemies into the water and then dives. It does not remain beside a ship exchanging attacks if open water offers an escape.

Game Statistics

Cadborosaurus and Other Sea Monsters

A cadborosaurus should not simply duplicate every large aquatic monster in the Bestiary. Its defining feature is not sheer destructive power but uncertainty: the animal is seen briefly, dives quickly and is remarkably difficult to pursue.

Video — Cadborosaurus and the Sea-Serpent Tradition

PBS Monstrum examines Cadborosaurus, the reports surrounding Caddy and the wider human tradition of seeing serpentine creatures in the sea. It provides a concise historical companion to the game material above without treating every regional sea-serpent tradition as the same creature.

Games Master’s Summary

The modern cryptozoological name is retained as the Bestiary entry title so players and Games Masters can identify the creature readily.