A sea dwelling mutation, C-Rex claimed its home in the waters around Jamaica. Feeding on the Giant Squids and their captured prey, the monster made no attacks against humankind until Zilla Junior and H.E.A.T. destroyed the last of its food source. Bursting from the waves it headed toward the city. Gun fire was useless against it, but soon it was face to face with Zilla, the ultimate mutation. The two clashed with H.E.A.T and the newly arriving United States forces watching. As they fought tooth and nail from the depths of the sea to the top of a cliff, the fight would soon end. Zilla burrowed through the rock, weakening the ground beneath their feet. C-Rex fell first, buried under tons of rocks after Zilla blasted its tentacles off. The rocks then fell under his weight, but Zilla would get up right away.
C-Rex was thought to be dead, but he’d make a great return sooner rather than later. Discovered in the depths by the Tachyon aliens, C-Rex was summoned to Site Omega and placed under their demand. He was instructed to rip London apart and that he did until being freed from control by H.E.A.T. He took the fight to the aliens and was punished for these actions. Defeated by the alien armada, Crustaceous Rex once again escaped death and was placed back on Site Omega by the Earth’s armies. The island would now be used as a monster haven, a place where they could live in peace and be studied by the curious scientists.
Given its own area of the island and isolated from the rest of the mutants by a force barrier, C-Rex was soon released by the monsters rights terrorist organization known as S.C.A.L.E. He, along with King Cobra, the Giant Bat, and the newly arriving Skeetera quickly got into a four way brawl between both C-Rex and King Cobra were imprisoned once again.
Being from a Crustacea the abilities of this tiny animal was given incredible large body from radiation to give enhance powers.
- Crustaceous Rex has tentacles on its mouth and chest for constricting and immobilizing opponents.
- Crustaceous Rex has an Ink Blast attack to blind enemies with.
- Regenerative tentacles that was shown from Zilla Jr use his fire on them to be rip off. Later will grows back.
- Durable body from his protective carapace was able to take attacks from Zilla Jr. Even survived from high cliff with fallen rocks on him.
- Able to be aquatic creature that is able to to walk on land.
- C-Rex is one of the few monsters to naturally feed on other kaiju.
- A prototype of the Trendmasters C-Rex figure exists.