They get about 2.5 inches so i dont have a worry that theyll get to big for a small tank. I found a recently dead (still smelled pretty bad) fiddler crab on the beach in front of my condo (Daytona...
Attract Females (The bigger the better)Fend off PredatorsIt's used just like a normal clabs claw, think of it as a normal claw and the other claw is small