So I was all happy about the tank upgrade I should be getting next weekend and spent sometime STARING at Ryu. I noticed his fins look "off." I'm not sure how to describe it. The dorsal fin has some small dark spots I didn't notice before. More noticeable is the slight curvature and thinned look to some of his lower fin and the one "curling" piece on his dorsal. Is this a sign of anything? Why is it occurring? Should I be concerned (how concerned)? What can I do to correct this if it is a problem?
He's still active, well colored, and a hungry pig.
See attached images! (Best I could get as Ryu likes to keep moving on me).