yes, there are several fish on the chart that you can breed...these are the ones frequently seen in their thought bubbles...
pink fruitfish


orange pigmy


razorback carp (at least it looks like it to me)



you can breed other fish on the chart as well..of course you dont only have to breed these 3 above to keep customers happy...i think these fish in the thought bubbles are to let us know they like a variety in the tank.