Red bar anthia's eggs

The fertilized eggs is either floating or semi-floating.  Usually the unfertilised eggs will sink to the bottom of the tank.  Fertilized eggs are transparent while unfertilized eggs will gradually turn to opaque.  below are two pictures showing that the one row of fertilized egg along the surface line of the water.  The first picture with flash open while the second one without flash.

The fertilized egg will rapidly change to prolarvae stage.  After 12 hours(before hatch) the appearance of the egg will become a line surround a transparent sphere.  The line will become the tail of the prolarvae.