High Level WoW Fishing

The real gold to be made from fishing in World of Warcraft is at higher levels. Higher in both terms of character level and in fishing skill.

The best "old world" fish is Stonescale Eel. Demand for these is sporadic, I've seen them selling for 3 gold each at times. A few days later demand may fall off and you can't give them away. I usually just keep them and check for demand every few days.

The best places to fish for these are:

Bay of Storms in Azshara
Feathermoon Stronghold in Feralas

Feathermoon itself is Alliance only but Horde on non-PvP servers can fish just outside the stronghold without problems.

Another fish to consider is Whitescale Salmon from Winterspring and Eastern Plaguelands. These sell easily for a gold each.

If you can get to the Outlands (Burning Crusade expansion), you can make a lot more gold once your fishing skill is 350+. A favorite of mine is Goldenscale Vendorfish which I guess was put in as some sort of joke by Blizzard. Either way, you can turn around and sell it to any vendor for 6 gold. It seems that these can be caught in any Outlands zone. I've caught several in Zangarmarsh and Nagrand. You won't catch many of these, maybe two an hour but even these few improve your hourly gold rate.

Another favorite Outlands fish is the Furious Crawdad which sells for between 1.5 and 2 gold any day. These are very easy to catch in Blackwind Lake in Terrokar Forest. The bad news is that this lake requires a flying mount to reach. The good news is that the drop rate is around 40% so it's easy to make 60 to 80 gold an hour on these.

Terrokar Forest also has Golden Darter in the area around Allerian Stronghold. These will sell for 2 gold but have a lower drop rate than the Furious Crawdad.

Other outlands fish can sell well at times depending on demand. Many fish are a key component in high level cooking recipes and if somebody is trying to lvl up cooking then they will get snapped up quickly in the AH.