What is the catfish food for fingerlings or young fish babies?

The young cat fishes eat very less. But the male catfish helps in guarding the eggs and newly hatched fry to make sure that they are strong enough to search for their own food. Before they grow and reach the stage of maturity, they only search and hunt for foods which can be easily caught and consumed. So, they hunt for worms or invertebrates. Moreover, they mostly eat hellgrammites, insect larvae, small cray fish etc.