They are gonna be a little bit dried out by now... give em a bath in some ice cold water to hydrate them and then fry em up / bake em / etc.
Generally speaking fresh caught fish that has been properly handled you can expect a fridge life of up to 1 week. If your worried about it just fry em a bit more / bake em for an extra 1 0 minutes..
PS the true standard is the sniff test.... they should have a little bit of a fishy odor... but no ammonia smell.