I've eaten them a few times at my neighborhood bar and grill
I don't know if this is some kind of classic recipe, but here's the description of what they serve;
3 flour tortillas stuffed with spicy breaded white fish, shredded cabbage, cheese, lime vinaigrette, tomatoes, sour cream, and salsa.
And that spicy breaded fish is SPICY!
I really like them a lot although I haven't been ordering them lately.
Does that sound like a normal fish taco or are there major variations? They are the only ones I've had.