Girtablilu- Akkadian myth: had the upper body of a human and the lower half is the whole body of a giant scorpion. These were the guardians of the gate to the land of darkness. There were two in the epic of Gilgamesh
This monster from Greek mythology is called a hydra and is significant because it is the antagonist in many Greek myths including the Second Labor of Hercules. The hydra is a serpent like monster that grows multiple heads in the absence of the first.