fiddler crab questions?

Question

I have 2 main questions 1 my friend has a fiddler crab in freshwater and it is about 3 years old so what species is it it does have a sorda yellow colour and 2 if I made a new tank for one and had fresh water with land and no filter and I just cleaned it onse a week and no heater just room temperature how would it do note I do have a under tank hermit crab heater would that work

Answer 1

Fiddler crabs do well at a range of temperatures between about 75-85 F (24-29 C).

The fiddler crabs found in pet stores are most likely semi-terrestrial brackish crabs, which means they need some salt in their water as well as access to air and dry land.

Unfortunately, many pet stores keep fiddlers in a freshwater aquatic set up, and recommend the same to new owners. They may do fine in a fresh water and fully aquatic set up for weeks, but will eventually become weak and die. If possible, find a store that keeps them in brackish water, or wait for a new shipment so their time spent in fresh water is minimal.

Answer 2

Get a book. Books have to be fact checked while anyone can write anything on the internet.