Does a recipe for seafood gumbo require you to use a particular variety of fish?

Most recipes suggest the use of crab, prawn shells, greenlip mussels, scallops and cockles. Apart from thr greenlip mussels the rest of the type of these fish is not asked for and therefore any other type of crab etc can be used, however it is best to follow the general instruction of the recipe you are following for the best result.