I have crabs. 5 of them to be exact. They are small fiddler crabs.
They are in a 10 gallon tank, 1/3 filled with:
-Large bonsai (plastic) they can climb it well)
-False log. (hollow)
-Red and black rocks
-Mini Filter
-Fake seaweed, electric green.
All but the rocks and filter are half submerged so they can come up to wave and posture and fight.
They are
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