The Planted Tank Forum - View Single Post - Red Devil Fiddler Crab
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Old 11-17-2012, 07:01 PM   #11
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Well, the answer will depend on whether these are "red devil" Geosesarma, which actually aren't fiddler crabs, or some reddish Uca like U. crassipes, which are true fiddlers -- but usually go by other names (like "watermelon fiddler crab").

If they're Uca, they should be treated like regular fiddlers (brackish water and haul-out spots or dedicated land region). Geosesarma are, as noted above, generally more terrestrial than fiddlers (but need plain, unsalted freshwater).
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