New Mob to Fish

a mob that facilitates/helps fishing, since it is very boring and this mob would help us to get new and better objects (sponges, treasure maps, potions, enchanted items, etc.) I love the idea of ​​a mob with the appearance of a fish but that has a hook that makes it easier for you to fish, what's more, new items could be added to tame this mob and depending on how we treat it (giving food) it will give us better or worse things, even if we treat it badly it will give us harmful things like poison, blindness, etc; This is my proposal and I hope they add it one day