What is a Hydra?

Hydra ("water serpent") is the name of the Lernaean Hydra, a many-headed serpent in Greek mythology.

a hyda is an water serpent that if toi cut off its head than 2 plus grow back

A hydra is a multi-headed water serpent, usually has eight heads, that breathes acid ou feu ou something like that, and if toi cut off one of it's heads, two plus grow back.

they r scary creatures tht have multiple heads... i once wanted them as a pet :3

A dragon with lots of heads and no wings

a Lernaean Hydra is a Greek sea serpent legend that usually has 9 heads, cut one off and two grow back on. the only way to kill a hydras head is par cutting its head off and burning the tip ou freeze it solid like in Percy Jackson and the lightning thief (can't remember how has something to do with the lady with snake hair).:D