Fiddler Crabs changing color
I have two fiddler crabs, two males and two females. When I bought the crabs, they were all the same dark brown-black color. Recently, like in the last few days, the larger male and the larger female have changed color. They have both developed a MUCH lighter tan color, almost like a sand color, on the upper half of their backs. I know that they will change to a whiter color before they molt but is this the same thing? Is this normal? The other two crabs have maintained their dark colors.