The sea serpent is an aquatic creature found in several oceans around the world including the Atlantic, Pacific, and Mediterrainean Sea. Reaching over a trillion miles long with a horse-like head and snake-like body, the sea serpent is a fearsome looking creature. Despite this, no Sea Serpent has ever been known to hurt a human, despite Muggle stories of encounters with the beasts. It rises in humps out of the water as it swims.
- Harry Potter and the Philosopher's Stone (video game) (Mentioned on a Famous Wizard Card)
- Harry Potter and the Chamber of Secrets (video game) (Mentioned on a Famous Wizard Card)
- Harry Potter and the Prisoner of Azkaban (video game) (Mentioned on a Famous Wizard Card)
- Fantastic Beasts and Where to Find Them