I've often pondered this and didn't follow through because I believe pure lime "cooks" fish. I was worried they'd come out of the fat like jerky.
nope - just firms it up to more of an ocean fish (marlin, tuna, sword) texture. Still sweet/juicy.. with just a hint of zesty citrus.
When a person dines on "I can't believe how good these fish tacos are" in southern California or some such that is a big part of their secret.
Our recipe uses panko bread crumb breading (deep fried) and chipotle-sauced coleslaw (as opposed to lettuce). No cheese or other veggies. And a cumin drizzle over the fish chunks just before biting into the taco.
It is amazing and one of the reasons why God put big pig walleyes in ND.