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How to care for brackish water fiddler crabs (uca minax )
Provide space.
Fiddlers need room, only two can fit in a 5 gallon (18. 9 l) aquarium and only four can fit in a 10 gallon (37.9 l) aquarium. So make sure you get the proper size aquarium.
Provide lots of climbing and hiding spots. Provide the right environment for your fiddler crabs.