The two fish do not have to be different, using two of the same category is just a trick you can use to use your entire stock up. So if the recipe calls for 2 fish and you have 3 rosy bitterlings and 3 soho bitterlings you can cook with 2x rosy's and then 2x soho's and then 1 of each. You can also use this same principle on any other category like grain (recipe requires 2x grain: use 1 wheat and 1 potato for example).

For dried fish, I had no problem using 2x green or better dried fish, but when I tried to use 2 Dried Sandeel (white), I didn't have great success. It did succeed at times, but failed constantly.

that recipe is wrong, i tried it over and over and got frustrated. The actually recipe is "2 fish, 3 olive oil, and 2 salt"...

confirm with same fish dray one and use 2 dray fish 1 fish 3 olive oil 2 salt

The recipe is correct: 1 fish, another different fish, salt, oil.

At Artisan cooking level, can confirm this works with 1x olive oil + 2x salt + 4x dried white fish. You can use 4x of the same dried white fish, or 2x dried fish A + 2x dried fish B. I was getting success+fails using only 2x dried white fish. Also success+fails using 3x dried white fish. No fails using 4x dried white fish (4x same type _or_ 2x type A + 2x type B)

Combinations that work: 2 white fish, 1 green/blue/yellow fish, 4 dried white fish, 2 dried green fish, 1 dried blue/yellow fish

At cooking artisan level 9, used [b]two different white fish, success 50 %. With 2 same green fish, success 100 %.

the recipe failed with 2 dried fish, but got 100% ratio 100 times in a row using 2 olive oil and 2 salt instead

With guru 3 work with 1 dried fish 1 oil 2 salt