To unlock the You're a Catch trophy in Far Cry New Dawn, you will need to catch one of each of the six different types of fish in the game.
The first step will be to purchase the Fishing Rod perk for two perk points, which will add a fishing rod to your weapon wheel. The Outdoor Enthusiast perk available for 7 perk points will also help as it makes reeling in fish easier once they are hooked.
The six types of fish you will need to catch in Far Cry New Dawn are and their locations are below:
Rainbow Trout: Southwest of The Chop Shop at the southern edge of the map. From the houses found there, go southwest towards the start of the trees.
Bull Trout: West of the Chop Shop, near the water.
Smallmouth Bass: Directly south of the Broken Forge Outpost.
Chinook Salmon: West of the Broken Forge Outpost on the left side of the river.
Largemouth Bass: Southeast of Sacred Lumber / southwest from Trailer Town at the river.
Paddlefish Sturgeon: Southeast of The Watering hole Outpost / east of The Island Outpost. Fish on the upper side of the small stretched island.
The shark and demon fish are not needed for the You're a Catch trophy.
You can purchase maps from the Cartography Center that will reveal the locations if you're struggling to find any.