Cats love fish :-D
Did you know that up to abut 60 or so years ago cats -- originally dessert animals -- did not eat/like fish? (I mean, they ate it IF they had too, but they didn't prefer it.)
That changed in WWII when four-legged meat was no longer available for pet food; however, nasty old fish left overs were. So the pet food companies diddled around with the fish-based formula+smell+taste to something the cats would eat...and viola! Kitty's "Seafood Delight", "Tuna and Chicken in Gravy", and "Salmon Delight in Sauce".