mediumaevum:

In Medieval folklore, the Ziphius, or “Water-Owl”, was a monstrous nautical creature said to attack ships in the northern seas. It possessed the body of a fish and the head of an owl, complete with massive eyes and a wedge-shaped beak. “Ziphius”, meaning “sword-like” in Latin, may refer to the beast’s fin, which was said to pierce the hulls of ships like a sword.

Today, the inspiration for the Ziphius is known as Cuvier’s Beaked Whale, a widespread species of beaked whale. Also known as the Goose-beaked whale, this creature is found as far north as the Shetland Islands and as south as Tierra Del Fuego at the tip of South America. It is the only member of the genus Ziphius, which bears the name of its legendary identity.

drawing by zuckerglider