Upon attempting to whittle down my lengthy list of fish to catch while simultaneously circuiting the world working on archaeology, I noted that Stratholme was listed as an excellent spot to catch Whitescale Salmon. (Of course with all the plague contamination in there, it's probably a good thing I'm not also working on my cooking!)
Alas, the green pools of goo inside the ziggurats in Stratholme are no longer fishable! Every cast that didn't result in a "cast did not land in fishable water" instead told me that "there are no fish here." (Does everyone's fishing pole talk or is that just something we draenei came up with?)
After having tried all three ziggurats from multiple angles with no difference, I left Stratholme and proceeded onwards to one of the ziggurats in Plaguewood, just to see if I was doing it wrong. But no, this ziggy was perfectly castable, and yielded some beautiful (if slightly plagued) Redgill.
Our days of urban apocalyptical ziggurat oceanography appear to be over, my friends.