I'd say swept away. I've never seen a fry the next morning.
If you think about it, if you think about how many potential offspring a pair can produce over a lifetime; and yet, for the population to remain stable, theoretically/on-average only 2 need to survive into adulthood and reproduce (to replace their parents) - that's a lot of mortality.
In the many years I've had a breeding pair or another of clowns - I haven't actually witnessed a hatching yet. However, I have witnessed on a couple of occasions a shrimp hatching (peppermints and cleaners) - and - I can tell you the tank inhabitants go into a berserk feeding frenzy once they realize what's going on. I imagine it's a similar thing here. I know it's sad but I suspect the fry really don't last much longer than a few minutes or a few hours tops.