|Average height||160 ft.|
|Behind the Scenes|
|Performed by||Mixture of a T-Rex, a bear, and a caribou.|
Crustaceous Rex, or C-Rex for short, is a large mutated crab/squid hybrid who feeds on oil and other squid.
C-Rex claimed its territory as the waters surrounding Jamaica. It mostly left humans alone, simply hunting mutant giant squid and going about its business. It didn't actively attack humans until the organization known as H.E.A.T. wiped out C-Rex's main food source with the aid of Zilla. Crustaceous Rex began attacking the nearest city, only to in turn be attacked by Zilla. C-Rex was wounded in the battle and retreated to the ocean depths. It would later fall prey to alien mind control and be forced to attack London. Crustaceous Rex currently resides at Site Omega, a monster haven and research center located on an island. C-Rex is the only known member of its species.