hey my spotted marsh frog has gone like really dark an it looks sick? is there a disease that makes frogs turn really dark also it doesnt move around much... as it used to
frogs will change color depending on several things usually they will either go lighter or darker. but if he looks sick your going to have to post pics so we can see what it looks like befor and after as well as enclosure pics
chances are hes sic and there is probably not much you can do.