Sooner than better is good advice [uncljohn]
If you gut and remove the gills and keep the fish packed in ice . . . like some of the commercial fishermen do . . . it should be fresh for 3 to 4 days . . . saltwater fish seem to last better than freshwater fish
Have fun and catch a nice one ! or more if you want
Since there is no long a Miss Cécile in my life, I think I might rename my Bertram “Miss-Be-Haven too”
And get myself some new t-shirts.