Timmy,
The larvae will go through their first 2 molts and 7 days remaining in the cavity with the mother living on stored yolk. They then molt to the fourth stadial stage and immediately become photopositive and enter the plankton where they start to feed because the yolk is gone. If they cannot feed, they starve in a couple of days. I have reared them individually in cups fed only nutrient soak brine shrimp nauplii. They are in the plankton for a month and will molt 3 or 4 more times before they settle as 7-8 mm postlarvae.
Roy