Redirected from Cryptocleidus

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TriStar Kaiju
Godzilla The Series - Monsters - Cryptocleidus
Species                         Nicknames
Plesiosauroid Cryptocleidus, Cryptcledius
Height                           Length
40 meters 100 meters
Weight                             Forms
3,000 tons None
Controlled by                 Relationships
Tachyons None
  Allies                             Enemies
None Zilla Junior
First Appearance

Cryptocledius (クリプトクレディアス,   Kuriputokurediasu?) is a plesiosaur kaiju created by TriStar Pictures that first appeared in the 1998 Godzilla: The Series episode, Leviathan.


Cryptocledius were aquatic long-necked reptiles, or plesiosaurs, that went extinct at the end of the Cretaceous period, in 65,000,000 B.C. However, it seems a number of the Cryptocledius somehow survived extinction.


A Cryptocleidus appeared and attacked H.E.A.T.'s submarine until Zilla Junior appeared and started to fight it, just as H.E.A.T. discovers a Tachyon ship in the bottom of the ocean.

When H.E.A.T. get out of the Tachyon ship, another Cryptocledius appears. Zilla Junior tries to evade them and eventually hits a rock formation, causing the two Cryptocledius to be crushed by the rock slide.

During the event of Monster Wars, one of the Cryptocledius survived and was spotted swimming towards Site Omega. It attacked H.E.A.T.'s boat and was tricked into fighting the Giant Bat. After the fight was broken up, both mutations traveled to Site Omega. Once the aliens began their assault, Cryptocledius attacked Hong Kong. When the alien control was severed, Cryptocledius was killed by the Tachyon ship's beams.

Video Game Appearances


Era Icon - Toho
Era Icon - Tri-Star
Era Icon - Godzilla The Series
Era Icon - Kaiju

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