Old Ironjaw has been eluding me for some time! I spent quite a few hours fishing in Ironforge in the Forlorn Cavern trying to get that damn fish. But to no avail. Since Cata I haven't tried to fish Ironforge since I've been busy with dailies and raiding but I had some spare time so I thought what the hell!
I spent most of yesterday trying to fish in Ironforge, though I was semi-afk. Logged in today a few minutes before raid and did a few casts but I was hyper anxious because I logged in to have 2 85 Alliance on the other side of the water fishing as well! I didn't even see the fish in my catch when I got the achievement as I was worrying about getting a summon out in case I get ganked!
So here is Old Ironjaw, in my hot little hand. At long last! One more fishing achievement to go.... come on turtle! Which I have noticed, by the way, you can catch from Cata fishing pools as well!