I have the same question as Shawna, Suggestions are welcome!

You can try to substitute for Black Cod but all else will be disappointing. Black cod is fatty and glorious. Nothing else compares

If your question is about a replacement for black cod, here is the standard answer: use whatever is fresh and available in your area that closely resembles the original fish in the recipe, namely a firm textured white fish.

Best of luck.

Please let us know what your question is, so we can answer! I can't find any question from Shawna posted, and it's simpler if you state your own question; we'll be happy to try and help.