Thanks Dick! I was hoping "Master Benbow" would fill me in with his expertice on the blue fish

.
Here is what I have, the first pic is the fish when I bought it at 5.5" Aug. 2004 breeder Suda. The others are from this morning, the fish is at least 18" now, it grew like a weed over the summer.
What's good about this fish and what's bad, is it worth keeping? The ladder/zipper pulled back around the beginning of last spring, I hope that it will come back. The spot on the left side of the fish next to the dorsal fin also disappeared a few months back.
Don't tell me it's a "nice" fish, give me the skinny on it