I had pescadillas at a local joint. They were fish tacos. The shell was crisp, fried and light. It was filled with fresh fish that was not battered, topped with thick crema and lettuce.
It wasn't like a taco durado though. The shell was very light and thin.
Looking around on the web I'm not finding much, a couple of references that these might be Oaxacan. These are not the same as Baja battered fish tacos with the thin dressing and cabbage.
Anyone have any more info? Is the term meaningless in terms of location? Is that just the term for fish taco in Mexico?