^Yes.......after even one day, it is somewhat crappy, but FRESH it is absolutely incredible.
I remember decades ago in my teens, we caught a Spanish Mack on the beach. Took it home and ate it.
It is a blurry but fond memory. I recall thinking that THIS is the best fish I have ever eaten (and I ate fresh fish as often as possible).
Skip forward fifteen years or so......my buddy caught a King Mack and we broiled it that night. Absolutely incredible.
Of course, it goes without saying that FRESH fish is in an entirely different league than anything purchased. Mackerel is perhaps the best example.
I think maybe that the fish that most people "like" most are the ones that still taste good after a week or so on ice. Maks aren't one of these.