I got two false percula clownfish yesterday and one of them died within three hours of being added to the tank. right when i put him in, his body looked stiff and he just started sinking like he was dead, but then he started swimming. both of them hovered over the sand bed, and the one who had looked like he was dead wasnt looking to well. i noticed a real light white round spot on one of his fins, and im guessing thats why he died. im pretty sure it wasnt ick, the spot was too big. does anyone know what it could have been?