One of my blacks I noticed yesterday has a golf ball sized area on its side that actually looks bruised. The area has that brownish-yellow color an old bruise would. Also in the area it looks as if the scales are lifting a bit. From a head on view you can see a raise or bulge on the one side?? Weird thing is the aro is still eating ok and seems to have no mobility effect from it. Any1 have any idea what this could be? can a fish get a bruise from crashing into an object or a buyy from another fish?