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Large Water Flea

Daphnia (Ctenodaphnia) magna Straus 1820

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Daphnia magna (Large Water Flea) is a species of arthropods. They are associated with freshwater habitat. They are native to the Palearctic and The Nearctic. They are nocturnal herbivores. Individuals can grow to 5.9 mm. They have parental care (female provides care). They rely on swimming and drag powered swimming to move around.

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  • URI: https://eol.org/schema/terms/drag_based_swimming
  • Definition: Drag swimmers use a cyclic motion where they push water back in a power stroke, and return their limb forward in the return or recovery stroke. When they push water directly backwards, this moves their body forward, but as they return their limbs to the starting position, they push water forward, which will thus pull them back to some degree, and so opposes the direction that the body is heading. This opposing force is called drag. The return-stroke drag causes drag swimmers to employ different strategies than lift swimmers. Reducing drag on the return stroke is essential for optimizing efficiency.
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EOL has data for 34 attributes, including:

Known occurrences, collected specimens and observations of large water flea. View this species on GBIF