Get thee to Booty Bay with a Gold by the fishing Book "Expert Fishing, the Bass and You". Swim from Westfall if you have to( I made the swim at level 23, but I stayed close to shore in shallow water. Yes, a dumb Blonde way to do it, but I I got the book, lots of Strange Kelp and a Parrot once I got to Boot Bay). The book will pay for itself in no time. FireFin Snapper sell quick in the acution house if you put a good price, don't be greedy. I got 2 gold for 40 fish in 2 hours.
The Expert Book raises you to a level where you will suddenly find you can catch the "money fish", FireFin Snapper, Oily Blackmouth.
Also get http://wow.allakhazam.com/db/quest.html?wquest=1141, Quest: The Family and the Fishing Pole