A semi-translucent hydra, complete with a body column, head, and multiple tentacles, is pictured in front of a gray background.
How Hydras Regenerate Decapitated Heads
Hydra vulgaris constantly replenish the cells in their heads and grow new ones to reproduce asexually. But gene expression analyses reveal that regenerating a head after an injury is a very different process.
ABOVE: © ISTOCK.COM, IVAN MATTIOLI
How Hydras Regenerate Decapitated Heads
How Hydras Regenerate Decapitated Heads

Hydra vulgaris constantly replenish the cells in their heads and grow new ones to reproduce asexually. But gene expression analyses reveal that regenerating a head after an injury is a very different process.

Hydra vulgaris constantly replenish the cells in their heads and grow new ones to reproduce asexually. But gene expression analyses reveal that regenerating a head after an injury is a very different process.

ABOVE: © ISTOCK.COM, IVAN MATTIOLI
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Hydras

Hydra single-cell sequencing gene expression
Image of the Day: Expressive Hydra
Nicoletta Lanese | Jul 26, 2019
Researchers track which genes are active in the polyp during successive cell states.
Image of the Day: Squeeze In
Sukanya Charuchandra | Jul 30, 2018
A novel system lets researchers examine the neuromuscular features of a hydra.
Image of the Day: Spammed by Hydra
The Scientist Staff, The Scientist Staff | May 1, 2018
A junk mail filter can learn to pick out six behaviors of hydras by analyzing hours of video footage.