Remember Rod predators make their living hunting for grub. They have good sight also. When you approach the tank the fish know it’s dinner time
The fish have only been in the tanks about 10 days.
I am trying to feed train them by turning on the light and then immediately feeding. Based on the reactions of multiple species, I don't think I have feed trained them yet. It usually takes everyone a little while to find their food.
However, you may be correct that the sunfish immediately identified his tasty meal merely by sight identification. That would certainly match what I observed.
