Anomaly Ledger

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Hafgufa

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Painted illustration: giant whale with open jaws at the surface in a Norse sea
AI rendition based on witness descriptions, not an actual photo.
The aspidochelone, an island-sized sea beast, from a 15th-century Danish bestiary; the hafgufa is often linked to it
The Aspidochelone, from a 1400-1425 bestiary in the Danish Royal Library · Unknown author · Public domain (via Wikimedia Commons) · Image source

A sea monster of Norse texts, now thought to reflect whales' trap-feeding.

Explained Verdict: Researchers trace the hafgufa to whales trap-feeding with their mouths open at the surface.

Region
Oceans · Greenland Sea
First reports
Mid-13th-century Norwegian texts

Key sightings

Best evidence

Research links it to whale feeding behavior.

Sources