My Green Mandrian Goby that I have had for 3 1/2 months is suddenly acting weird. She is lethargic, breathing heavily and not moving (swimming) around. All parameters are the same WC 3 days ago. Plenty of Pods for her to munch on and have witnessed her eating the other fish(s) food as well. She is large 2 1/2" to 2 3/4" IDK if maybe it's just old age or what. The only thing different in the tank is my RBTA has taken the notion to extend out and around the front of the rock(s) instead of her normal dailey pilgrimage to the MH lights straight up. Could she have gotten stung? Anyway, throwing it up here for some idea's. Thanks,