I was at Wal-Mart today & my daughter saw some freshwater fiddler crabs for sale. I don’t usually buy any fish from Wally world because they never have anyone that really knows how to care for them. Well I downloaded a PDF from PetCo & nowhere in the PDF does it say they need to get out of the water. I think I have asked about this before about the Red Claw Crabs but would freshwater fiddler crabs live in my 50g tank along with my 1 Bamboo Shrimp, 2 Bala Sharks, 1 Power Blue Dwarf Gourami, 2 Golden Gouramis, 2 Opaline Gouramis, 1 Chinese Algae Eater, 1 Pleco, 2 Neon Gouramis & a 3 spot Gourami. Do they need to get out of the water from time to time?