Rostunger/Rosmar

The Rostunger is a sea monster known from Medieval times. They walk along the ocean floor on four short legs. They’re described as similar to the sea-calfe and sleep twelve hours a day. Their skin is too difficult to pierce with any weapon and they hang from rocks by their two long teeth. These teeth measure 3.75 feet in length and their bodies measure around 52.5 feet long.

Citations:

Topsell, Edward. The Elizabethan Zoo: A Book of Beasts Both Fabulous and Authentic. United Kingdom, F. Etchells & H. Macdonald, 1926.