What can i feed my baby Hydrolycus Payara fish?

I bought a payara fish like 2 days ago from pet supermarket. Its about 2 inches long. It stilll dont have the 2 big fangs but it gots some teeth. It doesnt eat, its too small to be eating any other smal fish so i tried feeding it some cut ham but it doesnt eat it. What should i feed it?? Any answers are helpful THANKs