Hedorah is an alien pollution kaiju created by Toho that first faced Godzilla in the 1971 Godzilla film, Godzilla vs. Hedorah. In its first form, Hedorah resembled a tadpole. In its second form, it resembled a quadrupedal reptile. Its third form was like a flying saucer, and its final form took on a humanoid shape. Hedorah's forms all share multiple common characteristics - all have green, kelp-like surfaces and large, yellow eyes with red irises. These eyes are positioned so that they blink sideways.