The fresh water crab lives in fresh water, water without salt. Salt water crab has gills that process the salt away. And those stay in salt water places like hmm oceans
Yes.
If the crab is in a tank of water, the crab will be able to eat tiny mircoscopic organisms found in the water until you are able to feed her. You shouldn't rely entirely on this however, since they need a variety in their diet. :)
depending on the species both
fiddler crabs drink fresh water.
Boiler feed is the fresh or treated water to replenish the water loss though evaporation or leak
you need a fresh air and the sun and the water.
Phytoplankton
feed it and let it have alot of water and shells. nitwit!
No hermit crabs need distilled water for fresh water (which they drink), and need SEA salt water for them to bathe in (so the exoskeleton gets stronger)
Feed it enough so it doesn't die.
crab