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


Sirenjaws are most likely named after the Sirens from Greek mythology, creatures that would lure sailors to their deaths through music and singing. The Sirenjaw is similar in method based on how it tricks prey into thinking its back is an island to step on before ambushing them.



Sirenjaws are massive crocodilian creatures with small orange eyes, four clawed and webbed limbs, long tails, and large jaws filled with razor-sharp teeth. Most notably, the back of the monsters are covered in deciduous trees and rocks, which gives the Sirenjaws the appearance of an island when submerged in water. The parts of a Sirenjaw that aren't covered in plant growth reveal that the creatures have thick, crocodilian skin covered in osteoderms.


The roar of the Sirejaw is written as "Kuraahh" in the comic.


Sirenjaws are ambush predators that lie in wait for any potential prey to land on its island-like back, in which the creature will then attack and devour it.


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.

— Monarch Creature Profile


Skull Island: The Birth of Kong

Aaron Brooks and his group unintentionally set foot on a Sirenjaw mistaking it for an island. The beast attacked the group but was scared off when it heard Kong's roar. The Sirenjaw is eventually killed by Kong, and its carcass attracted Psychovultures and Death Jackals to feast on it.

Godzilla vs. Kong - The Official Movie Novelization

Some of Jia's relatives were devoured by a Sirenjaw when they attempted to find shelter from the storm of Skull Island.



The Sirenjaw's plant-like body allows it to blend in with its environment, allowing unsuspecting prey to head straight for their jaws.

Amphibious Lifestyle

As vaguely crocodilian creatures, Sirenjaws thrive in water. They will lie still in bodies of water in order to mimic an island, thus attracting prey.


List of appearances



Kong: Skull Island