Sirenjaw

Sirenjaws, also known as Gigantus Crocodiliad, are giant reptilian kaiju that first appeared in the MonsterVerse comic Skull Island: The Birth of Kong.

Appearance
The Sirenjaw is a massive crocodilian-like creature covered in plantlife with small orange eyes. Its large jaws are filled with razor-sharp teeth. When submerged in water, the creature resembles an island.

Personality
The Sirenjaw is an ambush predator that lies and wait for any potential prey to land on its island-like back.

Origins
The Sirenjaw is a colossal crocodilian predator indigenous to the lakes and tributaries of the southern jungle. Its hybrid physiology exhibits some of the most extreme examples of florafauna yet seen. As it matures, the Sirenjaws goes through a pubescent stage in which a small nursery of deciduous trees grows across its rocky back, making it an integrated biological chapter of the jungle region in which it has thrived.

True to its name, the exotic plantlife and rock-like structures growing above the creature's submerged body prove too alluring to resist for the unsuspecting prey of the Siren. Any living thing that strays upon this "shore" is fated to discover that some islands have teeth.

Skull Island: The Birth of Kong
Aaron Brooks and his group unintentionally set foot on an island that is actually a Sirenjaw. The beast attack the group, but is scared off when it heard Kong's roar.