Talk:Fishing/@comment-73.21.253.82-20190226194644/@comment-38713052-20190316131531

That would greatly boost the HP (the stat that gets lowered each day to determine hunger) of all fish in the tank at that time... though it wouldn't leave any surplus food in the tank to be consumed by fish placed/bred in the tank at a later time.

See the Breeding Fish page for more info.