I noticed that the supermarket near my house has a separate freezer section for seafood (maybe it needs a different temperature than the main freezer?). About h

I noticed that the supermarket near my house has a separate freezer section for seafood (maybe it needs a different temperature than the main freezer?). About half of it is fish sticks or some other kind of fried fish/shrimp (mostly carbs on the nutrition info), and the other half is fried fish fillets of various kinds (a lot more protein). I was curious what a good frozen fish fillet to buy would be, that would be easy to cook and healthy. It’s not an ingredient I have any experience with.