Garthangiclaw
Garthangiclaw is a large sea dwelling animal that feeds on anything and everything, however, over the recent years, has been said to be developing a taste for humans.

It is said to be the size of a double decker bus, and can shoot poison darts from 1356ft below sea level with 98% accuracy. It also has the ability to fly, but airtime does not generally exceed 12 seconds.

It has only been seen twice, and it is said that Garthangiclaw let these people live (after eating their vessel and remaining crew) for the specific purpose of telling its story (yes, Garthangiclaw can talk).
"neoh my gaad, it's Garthangiclaw!"