Hydra is a genus of small, fresh-water organisms of the phylum Cnidaria and class Hydrozoa. They are native to the temperate and tropical regions. Biologists are especially interested in Hydra because of their regenerative ability – they do not appear to die of old age, or indeed to age at all.
- It played Princess Morbucks in The Powerpuff Mythical Creatures and The Powerpuff Mythical Creatures (2016)
- It played Savage Rex in We're Back!: A Mythical Creature's Story