Red Spot Cardinal – this costs 15 coins each. But once it hatches, you can sell it for 38 coins per fish! Therefore, each fish will give you a profit of 23 coins. Now how about getting 15 Red Spot Cardies in the tank? Now that would be about 345 after selling, right?
Mini Dart Goby – this is two times lower than the cardinal. For only 7 coins each you will get to grow these fingerlings within 5 minutes! Then sell it for 18 coins each. If you really want to earn more then have 15 gobies at your tank all at the same time. Within 5 minutes, you will gain as much as 165 coins in just a short span!