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Scott Loarie   cc-publicdomain

Tylos niveus (Snowy Calloused Beach Pillbug) is a species of isopods in the family Tylidae. They are detritivores. They rely on 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 11 attributes, including:

Known occurrences, collected specimens and observations of Snowy Calloused Beach Pillbug from the Global Biodiversity Information Facility   GBIF provides free and open access to biodiversity data. View this species on GBIF