I did some macro (close-up) work with the camera today.
The fish section of one of the local groceries has extremely fresh fish set out on ice, with the type of fish varying by what's available. Today it was black bass. This is the pectoral fin and scales of its right side.
I tried to work out what this was before reading about it. Now I know it's quite obvious and a fabulous macro shot. Did the fishmonger wonder why you were photographing his display?