Defenders Of Earth - Zedus

Lizard Monster
Zedus

Gender: Male
Height: 65 meters
Length: 150 meters
Weight: 500 tons

In 2006, nuclear waste in Australia has caused a frilled lizard that wandered into the contaminated area to mutate. During the process of the mutation, the frilled lizard began to undergo a monstrous transformation: it developed a bipedal structure not unlike those of theropod dinosaurs, it increased in size, and it grew spines out of its back. Aside from the transformation, the mutation also gave the frilled lizard bizarre abilities such as semi-aquatic behavior and an extendable tongue not unlike Barugon. 

Later, the monster attacked several ships in the open ocean before making landfall in Iso-Shima.

Character (C) Daiei/Kadokawa
Redesign (C) Me