Breedable Fish

Gathering a lot of tropical fish and salmon or cod can be very annoying, so why not add an option to be able to breed fish! This would make getting large numbers of fish for aquariums and or breeding cats and axolotls MUCH easier. This would also add a fun option into the game of making your own fish farms that actually produce fish! 

     Fish could be bred with kelp or seaweed. Maybe there could be an add on for fish eggs and baby fish as well. So now have fun creating more fish to populate your rivers and oceans if you want to be Eco-friendly as well, or make a killing chamber to get lots of edible fish meat(aka raw cod/salmon etc.).