+Hydra is a genus of small, freshwater [invertebrates](/wiki/Invertebrate) known for their remarkable [regenerative](/wiki/Regeneration) capabilities. These tiny, tube-shaped animals possess simple nerve nets and tentacles, constantly renewing their cells.
+## See also
+- [Cnidarian](/wiki/Cnidarian)
+- [Polyp](/wiki/Polyp)
+- [Tentacle](/wiki/Tentacle)
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