Crustacean (invertebrate animal) that swims upside down; 20 body segments with appendages on the first 11-12 segments; eyes on stalks; no hard shell covering body
Small ponds, springs, meltwater pools
Detritus, small crustaceans, rotifers, protozoans, algae, diatoms and other plankton
Ducks, phalaropes, water shrews, diving beetles, other aquatic invertebrates, fish
Females are often more abundant than males. In some types, no males are known and develop from eggs that have never been fertilized.
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