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Their plankton includes forms very like Cyclops and the water flea.

However the water flea has spread in recent years to many areas throughout Europe including some ports and inland lakes outside its natural range.

The spiny water flea, is causing serious concerns in the lakes of Canada.

Cladocera is an order of small crustaceans commonly called water fleas.

The animal with the most genes is the water flea, which has 8,000 more genes than humans.

Daphnia pulex is the most common species of water flea.

We think it's because that's where it finds the water fleas.

Among them are some "water fleas," which are actually crustaceans.

It seeks mosquito larvae and water fleas directly below the surface film.

The water fleas are in turn eaten by small fish.