Image of Spiny waterflea
Creatures » » Animal » » Arthropods » » Branchiopods » » Cercopagidae »

Spiny Waterflea

Bythotrephes longimanus Leydig 1860


Bythotrephes longimanus (Spiny Waterflea) is a species of arthropods in the family Cercopagidae. They are associated with freshwater habitat. They are native to Lake Constance, Germany, Belgium, Norway, The Netherlands, Russia, Switzerland, Poland, Italy, Austria, and United Kingdom. Individuals can grow to 9 mm. They rely on drag powered swimming to move around.

show all records
  • 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.
show all records

EOL has data for 17 attributes, including:

Known occurrences, collected specimens and observations of Spiny waterflea. View this species on GBIF