KING KONG species
Aciedactylus mandocaris

Aciedactylus mandocaris.

Conservation status Extinct (Skull Island)
Height -
Weight -
Origins -
Distribution -
First appearance -
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Created by Peter Jackson and Weta Workshop

Aciedactylus mandocaris, meaning "Sharp-Edge-Fingers Devour-Crab", is a species of dinosaur that is found on Skull Island. The animal is described in the book "The World of Kong: A Natural History of Skull Island" (2005).


Aciedactylus is found in the mangrove forests and on the edges of the brackish swamps of Skull Island. Non-aggressive (despite its great size), Aciedactylus eats mollusks and crabs, crushing them up with its thick teeth. It locates its prey by burying its nose in shallow water of mud, grubbing for food. Due to having a secondary set of nostrils mounted high on the head, Aciedactylus can remain in this posture for extended periods.



Aciedactylus is a bipedal creature with a typical theropod body shape, with a long neck and tail, and grows to be 12 to 15 or 16 feet long maximum, and weights 300 kg. Its feet are large for its size, while its forelimbs end in long claws. It is colored a grayish-brown. Its arms, thin and fragile looking in comparison to the rest of the body, sport three fingers, two of which bear long claws. The third is small and rudimentary. Aciedactylus mainly uses its claws for self defense. Its typical theropod skull has powerful jaws filled with strong teeth adapted for breaking through hard shells. It also has a pair of pointy crests above the eyes. These crests feature a second set of nostrils. It's scaled skin gives it damage resistance. It is splay footed which usable for swimming giving it up to 8 of running.


Wide, splay feet allow Aciedactylus to move across mud and wet sand with ease, allow it to escape larger and heavier predators. If attacked, Aciedactylus will defend itself with the long blade-like claws on its fingers. The World of Kong Book gives the Aciedactylus "8/16" for running and "2/4" for swimmimg.


Aciedactylus lives in the island's swamps and estuaries, feeding on shellfish and crustaceans. Its broad, splay-toed feet prevent it from sinking into the soft mud it is surrounded by. When feeding, Aciedactylus can keep its head submerged indefinitely, closing its front nostrils and breathing through the secondary pair in its crests. The crests are also used for communication, acting like resonating chambers, producing frequent trumpeting sounds that can be heard from a considerable distance.Aciedactylus specializes in eating shellfish in the swampy estuaries and mangroves. Broad, splay-toed feet keep the dinosaur from sinking into the sodden mud and sand, but its most peculiar adaptation is the second pair of nostrils mounted atop its triangular nasal crests. Aciedactylus' primary nostrils can pinch shut when exhaling, forcing air into the resonating crests and small secondary nostrils to trumpet calls to one another. The main function of these secondary nostrils becomes clear during feeding. Sealing the primaries, Aciedactylus can breathe through the high-mounted secondaries, while most of its head is down in the shallow water or mud of the estuary, grubbing for shellfish.

See alsoEdit

List of King Kong creatures

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