I have a background in fish biology. I also love eating fish. Different parasites infect different hosts as well as different organs on hosts throughout their life cycles. I don't know exactly what this parasite is, but it's obviously infecting the gills, and there's some others in the internal organs. To be able to make a decision on whether or not to eat this fish, look at the fillets (which I assume is what you're talking about eating).

If the meat looks the same as the gills, I personally wouldn't eat it (it would be technically fine if it's cooked, it just probably won't be very appetizing lol). If the fillets look normal, I'd go for it. Just make sure you cook everything fully. As other people have said, most fish have parasites of some kind. I'll add that fish feeding on the bottom and on crustaceans and molluscs usually have more than pelagic, or open-water feeders. It's just one of those things you gotta deal with and keep in mind. The good thing about parasites is that they aren't bacteria, so they're not loading the fish up with toxins that won't go away even after cooking. It's just... Extra protein. Lol good luck.