I stopped to fish out of a swirling pool of fish in Terokkar Forest. I was using a +100 lure so I continued fishing until my five minutes ran out. One of the fish I pulled up after the pool was gone was a Goldenscale Vendorfish. Naturally it’s a gray item; thus good for nothing but the vendor. I laughed when I caught it and then continued on to town. I was rather surprised when I went to sell it and the vendor offered me 6 Gold.
So, should you fish one of these up you may not want to trash it for inventory space.