Unidentified turtle

The unnamed and unseen giant Turtle that is mentioned in Kong: Skull Island.

Appearance
Appears to be a regular turtle but much larger.

History
Monarch have a sketch of the turtle and it is seen during the opening credits to the movie. At first there is a sketch of its inner skeleton with the words 'M.U.T.O.: Massive Unidentified Terrestrial Organism' beside it and then there is a closeup of its eye.

Trivia

 * This giant turtle could be a reference to the Skeleturtle or even a nod to the Gamera franchise.