Image of Gammarid amphipod
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Gammarid Amphipod

Grandidierella japonica Stephensen 1938

Göteborg Natural History Museum. Göteborg Natural History Museum. Year: 2015.   cc-by-nc-sa-3.0

Grandidierella japonica (Gammarid Amphipod) is a species of amphipods in the family Aoridae. They are native to Sakhalin, Korean Peninsula, Kyushu, East China Sea, Sea Of Japan, Japanese Exclusive Economic Zone, and Hong Kong. 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 19 attributes, including:

Known occurrences, collected specimens and observations of Gammarid amphipod. View this species on GBIF