You need to raise your small goldfish by eating fish food pellets or other smaller fish. Fish food pellets are a good way to keep your fish full and growing. However, fish food pellets do not earn you points. Eating other smaller fish will not only keep you full and growing but you will earn points based on the size of the fish you eat. Make sure you watch your hunger indicator in the top right corner. If your fish does not get fed quick enough you will either die or lose growth points. Ever five times you eat either a fish food pellet or another fish you will grow to the next size.