Mine have been laying egg's every 14 days or so for close two two years and I have never seen any fry, ever.
You would have to take the rock out that they are attached to and put it in a tank just to raise them. I believe they need to be in the dark for the first few weeks and be fed rotofers every 3 to 5 hours. Can be done but a lot of work.
Here is a thread I started on my clowns.
http://canreef.com/vbulletin/showthread.php?t=34433