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  • This is a spanner crab (Ranina ranina), also known as a red frog crab. It is an edible crab found in tropical and sub-tropical waters. These crabs burrow into the sand rear-first, where they stay camouflaged with only their eyes protruding. They come out to scavenge for food. Unlike other crabs, this species walks in a forward direction. Though this crustacean is harvested for food, there is little known about this species’ ecology. It is the only species extant in its genus.
    red-spanner-frog-crab-ranina-ranina-...tif
  • This is a red frog spanner crab (Ranina ranina) creating a sandstorm as it runs across sandy substrate. This species is the only extant member of its genus and is considered a delicacy in many countries. When it emerges from the sand, this crab ambles across the sea floor with forward motion, unusual among the true crabs.
    red-frog-spanner-crab-ranina-ranina-...tif
  • This is a red frog spanner crab (Ranina ranina) walking across sandy substrate at high speed. When it emerges from the sand, this crab moves along the sea floor with forward motion, unusual among the true crabs. This species is the only extant member of its genus and is considered a delicacy in many countries.
    red-frog-spanner-crab-walking-ranina...tif
  • Rear view of a red frog spanner crab (Ranina ranina)
    red-frog-spanner-crab-rear-view-rani...tif
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Tony Wu Underwater Photography

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