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Cirein-cròin

Last reviewed Oct 25, 2026 Next review Nov 9, 2026

Painted illustration: colossal sea serpent among whales off the Scottish Hebrides — AI rendition based on witness descriptions, not an actual photo.

A sea serpent attacking a ship, a detail from Olaus Magnus's Carta Marina map of 1539. — A sea serpent attacking a ship, a detail from Olaus Magnus's Carta Marina map of 1539 · Olaus Magnus · Public domain (via Wikimedia Commons) · Image source

A sea monster of Scottish Gaelic folklore said to eat seven whales.

Folklore Verdict: We treat Cirein-cròin as folklore: the record is stories and local reports, with no specimen or verified photo.

Region: Oceans · United Kingdom (Scottish waters)
First reports: Gaelic folklore

Key sightings

Said to disguise itself as a small silver fish.

Best evidence

Stories and tradition only; no physical evidence.

Sources

Wikipedia: Cirein-cròin ↗