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Skullcrawlers, also known as Cranium Reptant, are giant reptilian Kaiju that appeared in Kong: Skull Island.


Skullcrawlers got their name from their skull-like heads and their crawling locomotions. Their true name is known but unspoken by the natives, and the name "Skullcrawler" was coined by Marlow as he explained their history to Weaver and Conrad.


Skullcrawlers are large reptilian creatures with only two long forelimbs and no hindlimbs, as well as long, prehensile, serpentine tails. They have long and slender, yet muscular, sturdy bodies. Several aspects of their appearance are noticeably skeletal, particularly their torsos and their heads. What appear to be the "eye sockets" of their skull-like heads are merely empty fenestrae: their real eyes are set much further back, with the fenestrae perhaps serving to distract enemies from their more vulnerable eyes and acting as heat-seeking sensory pits. The colors of their scales range from dark brown to dark green to a bone white color.

Their heads closely resemble those of Mosasaurs such as Tylosaurus, and their jaws possess two rows of serrated, razor-sharp teeth. The Skullcrawlers have four digits in total of each hand, with the thumb being the smallest digit and the rest of the digits being larger and of the same size, and a prominent bony spike protrudes out of each of their elbows. The thorny, toothlike structures of their inner mouths somewhat resemble that of a leatherback turtle's. Additionally, they have long, prehensile triple-forked tongues that they can use to grab their prey.

Skullcrawler adolescents are easily distinguishable from adult skullcrawlers. Their heads are smaller, and more sloped than an adult. They also possess a more prominently brown skin tone. Adult skullcrawlers are larger, with most being as big as Kong. Their heads are more defined, larger, and somewhat angled.


The roar of the Skullcrawler is very high in tone, possessing a raspy quality.


Skullcrawlers are subterranean pack-hunting predators with insatiable appetites that are the results of their heightened metabolisms. They are highly aggressive, as well as incredibly persistent in pursuing their prey. They do however show some degree of intelligence, shown when Skull Devil, the largest of the Skullcrawlers refuses to devour a grenade-armed Cole and simply swats him away. Adolescent Skullcrawlers appear to be naturally fearless, as two of them teamed up to attack Kong despite being smaller and out-muscled.

The Skull Devil appeared to be more intelligent than the rest of his kind. This was seen when he appeared only once Kong was subdued by Preston Packard. It also seems to have a hint of sadism as he licks Kong's face maliciously after he's been tangled up in a Shipwreck's rudder chain during their battle. The Skull Devil was also shown to have a deep desire of killing and eating humans, which was shown several times when he diverted his attention from Kong to James Conrad and Mason Weaver, implying that he acts not only from primal instinct but some degree of malice and cruelty.


Little is known about the origins of this voracious predator, although its evolutionary purpose is abundantly clear. The Skullcrawler exists to devour, destroy, and dominate. Subterranean in nature, burrowing up through the geologically unstable steam vents across Skull Island, it is as though the Skullcrawler climbed up out of hell itself.

This terrifying serpentine is a hypervore: a creature with such a hyper-adrenalized metabolism that it exists in a constant state of starvation. Just as a shark must keep swimming to survive, the Skullcrawler must keep feeding, dislocating its own jawbone so to maximize its ability to swallow anything that crosses its path. And within that gaping maw exists a long, whiplash tongue, which the creature uses to ensnare and constrict its prey. Its olfactory system can sense hot-blooded life across huge distances. Once it has picked up your scent, the blood in your veins is like blood in the water.

Perhaps most striking is the beast's fearful visage. A chilling, lidless skull-face peers out through translucent flesh, as two dark and lifeless eye sockets regard their prey with cold, unflinching malice. The patterning of its facial features may be indicative of deimatic behavior designed to threaten and terrify its prey.

Given the unreachable depths of their subterranean nesting grounds, we have no way of knowing how big these things get, or the pecking order that governs their tribal feeding patterns.

The more we learn about the cultural history of Skull Island from the indigenous petroglyphs we have discovered, the clearer it becomes that the evolution of the Skullcrawlers has long been interwoven with Kong and his fallen ancestors. If Kong is god of Skull Island, then here comes the devil.


80px-Spoiler.png SPOILER WARNING: This section may contain major plot and/or ending details. Proceed at your own discretion.

Kong: Skull Island

A Skullcrawler was first seen feasting on a dead Sker Buffalo by Kong. Kong was about to confront the creature when he was ambushed by a second Skullcrawler. After a lengthy battle, Kong ends up subduing and killing both Skullcrawlers by smashing one's skull with a devastating stomp and the other by stuffing its head into the ground, breaking its neck.

Another Skullcrawler ambushed Jack Chapman and a Spore Mantis, but went for Chapman and ate him alive while the Spore Mantis managed to escape. The same Skullcrawler then showed up in the boneyard and vomited Chapman's remains. When William Randa attempted to make his camera work, he was devoured by the Skullcrawler, who then tried to attack the group. Randa's camera started to flash inside the predator, which started to aggravate the monster.

The Skullcrawler then started chasing Mason Weaver, but the group retaliated using flamethrowers. The creature batted a crew member with its tail onto one of the Kong skulls, causing his backpack to detonate several canisters of toxic gas. The Skullcrawler started to grow relentless, and disturbed a flock of resting Leafwings which then turned their attention to attacking the group. James Conrad managed to killed some of the flying creatures using Hank Marlow's katana. The Skullcrawler then set its eyes on Conrad and Reg Slivko, but Weaver rescued them by tossing a lighter at one of the subterranean vents, creating an explosion that killed the Skullcrawler outright.

The Skull Devil, a sub-adult Skullcrawler, was awakened due to seismic explosives dropped onto Skull Island along with the rest of his kind. After Kong was incapacitated by Packard, Skull Devil let his presence be known by emerging out from the water. Thus began a three-part battle with Skull Devil having the upper hand on Kong initially. As he chased James Conrad and the other survivors of the research expedition sent to Skull Island, Earl Cole tried to sacrifice himself by arming several grenades before having the massive creature try to eat him. However, he didn't take the bait and batted him against the cliff as the grenades went off, killing him.

As the Skull Devil finally reached the rest of the crew, Kong appeared in time to stun it with a large boulder as the crew ran to safety.Skull Devil then turned his focus to Kong, pouncing on him and gripping his throat with his jaws. Kong and the Skull Devil continued to brutally wrestle, pummel and bite each other until the Skull Devil forced Kong into a shipwreck with a blow from his tail, where the ape became entangled in the chains. With Kong subdued in the wreck, Skull Devil returned his focus to the humans. As he approached the crew once more, Skull Devil's right eye was destroyed by a flare that Weaver fired, and this allowed Kong to use and swing the propeller of a wrecked ship at his adversary like a medieval flail, which caught the beast in the shoulder and allowed Kong to resume his fight with him.

During the battle, he was also fired upon by Conrad and his companions, allowing Kong to gain an advantage in the fight before finally uppercutting him with the ship's propeller, slicing the Skull Devil's throat wide open and seemingly killing him. As Kong saved Weaver, who had been knocked into the water earlier in the fight, Skull Devil pounced at Kong once more. After coiling his tail around Kong, he wrapped his tongue around the ape's arm, pulling it down his gullet in an attempt to devour Weaver. After a brief struggle, Kong tore the creature's internal organs out of his mouth, killing it outright.


Agility and speed

Skullcrawlers can run very quickly despite having only two legs, and their speed matches or surpasses that of an adult human. They can also make quick turns as well.


Being subterranean in nature, Skullcrawlers are capable in using their limbs to burrow deep into the earth.

Durability and stamina

Skullcrawlers are very durable, as they can withstand bullets from rifles and the searing heat of a flamethrower. Skull Devil was only dazed when Kong slammed his head with a boulder or smashed his face with a tree branch. They have incredible stamina, being able to stay in a full fledged fight for several minutes even whilst being incredibly injured.


Skullcrawlers are both solitary and pack hunters. One can kill a Sker Buffalo on its own, and they can cooperate to take down more powerful creatures such as Kong.

Olfactory system

Much like snakes, the Skullcrawlers' olfactory system allow them to sense hot-blooded lifeforms from miles away.

Physical strength

As the apex predators of Skull Island, Skullcrawlers are fearsome and deadly in battle, using their jaws full of razor-sharp teeth as their primary weapons. They can hold their own against opponents like Kong, able to withstand the blows and pummeling of the ape. Their serpent-like tails are used for swatting or for wrapping around an opponent during combat.

Prehensile tail and tongue

Skullcrawlers have prehensile tongues that they use to grab and quickly devour small prey, or for gripping large prey in combat. The tail is heavily muscled and extremely powerful, shown when Skull Devil lifted and flung Kong like a football across the lake with his tail. As stated before, the tail is also for wrapping around large prey, possibly to latch onto them for balance or to constrict them.


Fragile neck

Kong kills a young Skullcrawler by stomping on its neck, though the fully-grown Skull Devil is far more durable.

Heightened metabolism

Skullcrawlers possess accelerated metabolism, which causes them to live in constant starvation. This is shown when Skull Devil ravenously tried to eat Weaver, and refused to let go of Kong's arm. Kong then turned his appetite against him, tearing out his tongue and other attached organs.


Having only two limbs and walking on their front legs, their stance is rather unstable and easily toppled.


It is shown that Kong can easily eviscerate Skullcrawlers by yanking out their tongues, which are connected to their internal organs.

Vulnerable eyes

The eyes of a Skullcrawler are one of its only weak points, as seen when Weaver destroys one of the Skull Devil's eyes with a flare gun. It is likely that the large eye-like sockets on the front of their faces serve as distractions from their real eyes which are set further back. They may also serve a function as heat-seeking pits.


  • The Skullcrawlers' stomachs don't appear to have the capacity to digest bone, as one is seen vomiting bones, including a human skull, in the boneyard. This is similar to some species of snakes that eat eggs.
  • Leapers from Dead Space share a similar body design to the Skullcrawlers
  • In Birth of Kong #2 the Monarch file erroneously depicts a Skullcrawler with its eyes in front of the sockets as opposed to behind.
    • The cover of the same issue also shows a Skullcrawler tongue forked into four rather than three.
  • The Skullcrawlers' design have been influenced by the Two-Legged Lizard from the original 1933 King Kong film, along with Sachiel from Evangelion, No-Face from Spirited Away, and Cubone from Pokemon.[1]
  • The Skullcrawlers combine features of snakes, lizards, and mosasaurs, all of which are members of the reptile order Squamata (it is possible that the Skullcrawlers are ancient, highly-specialized members of this taxon).
  • According to Hank Marlow they are the "Devils" of Skull Island and are feared by the natives to the point where they won't mention their true name, this makes "Skullcrawler" an alias or a nickname, as Marlow admitted he just "made up the name" to make them sound scarier.
  • In the novelization, it is stated that the Skullcrawlers are amphibious, as Weaver mentioned the one in the boneyard had gills.
    • This is similar to the MonsterVerse Godzilla, who also is a reptile but strangely possesses gills.
    • The fact the Skullcrawler's eyesockets can be mistaken for their real eyes has a similiar fact for Orcas, as their white markings make people believe those are it's real eyes.

List of appearances




  1. Davis, Erik (February 17, 2017). DIRECTOR JORDAN VOGT-ROBERTS ON WHY 'KONG: SKULL ISLAND' IS UNLIKE ANY OTHER 'KING KONG' MOVIE Fandango. Retrieved June 27, 2017
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