I am sure they eat plenty of fish in the wild. Mine also eats frozen krill. Should I alternate using feeders and krill? I use cons mostly and and fatheads occasionally.
i have 3 gar/needle fish/whatever you want to call them and from the beginning i made sure their diet consists of mostly live feeders. its nice, i dont need a seperate tank because the gar eat the feeders as they please and i dont know why everyone is so down on gars. they are a very fun fish to have. i dont know how aggressive these cudas are, maybe they would eat all the feeders you put in there immediately. it might take them some times getting used to eating live food.