How Hydra’s interact with their environment -Predatory

Hydra are predators. Their tentacles are like jellyfishes; they have little stinging barbs (cells called Cnidocytes) that when touched, expel a poisonous thread towards the prey. The prey usually trigger many Cnidocytes at once, resulting in a fatal dose of neurotoxins.

This video shows a Hydra hunting and eating a Daphnia- ENJOY

Images
Hydra with tentacles:

Close up of hydra tentacle (end of it)

citations
http://www.ehow.com/info_8511524_adaptations-hydra.html

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