Hydra - Pond Life

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POND LIFE > Hydrozoa

Hydra is a genus of small simple fresh-water animal possessing radial symmetry. Hydras are predatory animals belonging to the phylum Cnidaria and the class Hydrozoa. I found them most fascinating as they are the freshwater equivalent of a sea anemone. Even if they re said to be common in unpolluted waters, it took me quite a while to find one of them, and just by accident. I discovered it only after. I put it in a small container with some small daphnia, copepods and ostracods. In less than three week the first one subdivided many many times and now I get at least 20/30 of them, still reproducing. If touched or disturbed hydra retract to form a small sphere. Overnight the move quite a lot even if I have never seen it happening.

My first hydra, the first day, after 3 day (starting to bud) and after 2 weeks.

Hydra eating a daphnia
Sequence taken with Sigma Macro 1:1 lens

Hydra feeding with ostracods
Taken with a 60x microscope and a Canon A12000 compact camera

My first hydra after 1 month
Pictures taken with a Sigma Macro 1:1 lens

Hydra preparing winter eggs?
Pictures taken with a Sigma Macro 1:1 lens and Kenko 2x teleconverter.

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