For the benefit of doubt, here are 2 links to witness how shrimps hatches their eggs and releasing new shrimplets into the environment.

CRS
http://www.youtube.com/watch?v=NMsXmQipSFg

Tiger Shrimp (silane)
http://www.youtube.com/watch?v=eMzv-MzZEx4

Hope these videos clear curious minds like mine! Cheers