Hi there, making of this datapack was fun but, i did murder some fishes for it.
anyways this datapack adds in a harpoon item that you can craft and used to kill fish.
(recipe in image too lazy to add more images)

Note: this only work on fishes guardians dolphin. and harpoon don't have cooldown

to catch fish aim at fish right click harpoon it will leave a trail as where its launched.
if your aim was correct (mine is terrible) the fish will die and its items will come to you.

hope you enjoy murdering fishes, good luck !
made by me idea from a friend in discord.