This snake has nine heads
Hydra is a fierce water snake creature born from Echinda and Typhon.
This water creature was well known as having more than one head on one body, usually nine heads.
Although this is only unicorn creature/animal, very few sea explorers in 5000BC reported seeing Hydra swam in the ocean then disappeared without trace. Experts can describe that animal as a unicorn because there is no proof such as fossil and so on.
The name Hydra then was used as a fierce alien creature named Hydra Lisk in the popular PC game title Star Craft/Brood War published by Blizzard Entertainment.
