All you need is cat ears, tail and make up your face with whiskers.
Take a large caldron (sold at Wal-mart/Target for about $5) paint it blue, use a fish stamp (also sold at Walmart for 97 cents).
Stamp the fish in any color you wish and hot glue some gravel from the fish department around the bottom of the caldron.
I used a fish plaque bought from the dollar store for her stolen fish!
Thanks to the Tereasa and Family for this great idea!