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Daphnia pulex
Daphnia with a cluster of protozoans, Vorticella, attached. The Vorticella are not parasitic but are only using the Daphnia as a place to anchor while they feed.
Shallow pond in rural SW Pennsylvania
Daphnia are often used as food for small tropical fish.
Spotted on Mar 5, 2009
Submitted on Dec 15, 2012
1 Comment
Daphnia are amazing, great image!