This is a datapack for Fishing Real that adds all Aquaculture fish to make them fishable.
This datapack has jsons for these following fish:
Arapaima
Arrau turtle
Atlantic cod
Atlantic halibut
Atlantic herring
Bayad
Blackfish
Bluegill
Boulti
Box turtle
Brown shrooma
Brown trout
Capitaine
Carp
Catfish
Combustive cod
Gar
Jellyfish
Minnow
Muskellunge
Pacific halibut
Perch
Pink salmon
Piranha
Pollock
Rainbow trout
Red grouper
Red shrooma
Smallmouth bass
Starshell turtle
Synodontis
Tambaqui
Tuna
If there is a fish not listed above, simply copy one of the files and change all of the item/entity references to your new fish.
Just download and add to your world's datapacks folder! You can open the folder for your world here (select edit world/datapacks): 