While thats interesting in its realism i dont see this being changed. Why would you throw it in the water when you can throw it in your trashcan, which if its upgraded will give you some money?
There’s not exactly a power bar, but you can drop anything (including fish) back into the water, and it’ll make a little splashing animation after a small delay (the delay is likely to give you a chance to pick up something you didn’t mean to throw into the water)