Ghidrah is perhaps the most famous and most powerful of all of Godzilla's foes, and would later be known as King Ghidorah. A very unique character, because Ghidrah is a three-headed dragon, with two tails.
Other appearances by this monster include: Godzilla vs. Monster Zero (Or just referred to as "Monster Zero") Destroy All Monsters Godzilla vs. Gigan Godzilla vs. King Ghidorah Godzilla, Mothra and King Ghidorah: Giant Monsters All Out Attack Godzilla: Final Wars (as Monster X, then forms into Keizer Ghidorah)
My YouTube channel - [link] Ghidrah/King Ghidorah art video - [link]
Did you know what the original description of King Ghidorah was given to the effects dept when they first set out to make the film Ghidorah the Three Headed Monster? The told the special effects manager to make, "A monster with three heads, two tails and a roar that sounds like a ringing bell."