Looks like you have wigglers my dear

Hope those brine shrimp are almost ready
usually 3-4 days after eggs are laid they will hatch(wigglers), then 3-4 days later they will be free swimming, at the free swimming stage they will start to eat. brine shrimp are a good first food because they are so tiny. They will also graze on shrimp pellets and algae wafers. Because they eat all the time its easy for the water to get fouled. You know what goes in always comes out and then theres excess food. So 50% water changes each day are very important. Good luck! cory fry are so cute!
Carol