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Image of teddy-bear crab
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Teddy Bear Crab

Polydectus cupulifer (Latreille ex Milbert 1812)

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Polydectus cupulifer (Teddy Bear Crab) is a species of decapods in the family mud crabs. They rely on drag powered swimming to move around.

  • 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 18 attributes, including:

Known occurrences, collected specimens and observations of teddy-bear crab. View this species on GBIF