I would give the same advice to women on dating apps. Perhaps some men will be attracted to you because you fish. But I doubt it. Let that mystery bubble up organically. “She’s smart, interesting, and beautiful… and it turns out she likes to fish!!! What a woman.” And even if the picture of you holding that big ugly fish does turn the head of that guy on the other end of the dating app. Remember the old joke;

Wanted: Good looking woman who wants to date. Must have a bass boat and trailer. Please send a picture of the boat.

If this sets your heart aflutter, then, by all means, include a picture of your fish.