Crab in SW to go to FW?

Not for very long, crabs can regulate their blood chemistry for a while, but will lost salt through the gills (by osmosis) and when it sheds for the first time in fresh water wont survive. If you want a freshwater crab there are several species from south america, aftica and asia that should fit the bill, just make sure that they are a true fresh water crab (not a brackish water) and that if they need to be out of water for a time they have a place to crawl up, not all crabs are fully aquatic.
 
Back
Top