Hydra (animal)

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Hydra
Scientific classification
Kingdom: Animalia
Phylum: Cnidaria
Class: Hydrozoa
Order: Hydroida
Family: Hydridae
Genus: Hydra
Linnaeus, 1758

Hydras are simple Invertebrates. They live in the water. Their body is radially symmetric. They are protozoa, and belong to the same order as the polyps. Most hydras are microscopic in size. Hydras can be found in almost any unpolluted body of water.