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Topic: Water flea

	Water fleas
		Water fleas belong to the Crustacea, a large group of 'jointed limbed' animals, most of which live in water.
		The chief characteristic of the water fleas is that the main part of the body is enclosed in a kind of shell, with the appearance of two lids, but made of one piece.
		Water fleas are beautiful creatures to observe through the microscope.
	www.microscopy-uk.org.uk /mag/artjun99/wflea.html (470 words)

	Water flea - Wikipedia, the free encyclopedia
		Water flea is a generic term for a number of small aquatic crustacea characterised by their jumping or jerky mode of swimming.
		Water fleas are commonly sold as aquarium food since they are easy to culture and reproduce rapidly.
		The "spiny water flea", Bythotrephes cederstroemi, is causing serious concerns in the lakes of Canada.
	en.wikipedia.org /wiki/Water_flea (169 words)

	Harmful Aquatic Hitchhikers: Crustaceans: Spiny Water Flea and Fishhook Water Flea
		As two of the lesser known hitchhikers, the spiny and fishhook water fleas are part of group of animals known as crustaceans that include crabs, shrimp, crayfish and lobsters.
		Although these water fleas are relatively small, (average length is scarcely more than one centimeter 0.4 inch), they can have as profound an effect on an ecosystem as a larger invader.
		Studies indicate spiny water fleas adversely affect the growth rates and survival of young fish, due to the competition for food and experts believe the fishhook water flea will have the same effect.
	www.protectyourwaters.net /hitchhikers/crustaceans_spiny_water_flea.php (767 words)

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